ライフサイエンスコーパス: preconcentration

1 eved by selective photoreduction previous Se preconcentration.

2 nuous solid-phase extraction for cleanup and preconcentration.

3 mL) and does not rely on any form of sample preconcentration.

4 e photodetector and without requiring sample preconcentration.

5 e (Se-MetSeCys), and selenocysteine (Se-Cys) preconcentration.

6 separation, purification, fractionation, and preconcentration.

7 d, parallelization, signal amplification and preconcentration.

8 an 5 s at ambient temperature without sample preconcentration.

9 l time at ambient temperature without sample preconcentration.

10 pecialized chromatographic columns or sample preconcentration.

11 ficient to detect total Abeta in CSF without preconcentration.

12 lows the use of different sample volumes for preconcentration.

13 can have an even more drastic effect on the preconcentration.

14 for analyte purification, fractionation, and preconcentration.

15 ude compared to immunoassays without analyte preconcentration.

16 section, resulting in efficient anion sample preconcentration.

17 de was used to demonstrate ion isolation and preconcentration.

18 ITP preconcentration accelerates the affinity reaction, redu

19 to which each topology facilitates reactant preconcentration and alignment of PC and NAI via coordin

20 orbent was investigated in rapid extraction, preconcentration and also determination of trace amounts

21 lly, the effects of inorganic ions on sample preconcentration and CE separation were evaluated.

22 acetonitrile, ethyl acetate and water, with preconcentration and derivatization, to produce stable f

23 se phase coated magnetic beads (Mbs) for the preconcentration and detection of the peptides.

24 A useful preconcentration and determination method was proposed f

25 d phase extraction sorbent for the selective preconcentration and determination of AMP in cow milk sa

26 oses a simple and sensitive approach for the preconcentration and determination of carboxylated singl

27 d phase extraction system for the separation/preconcentration and determination of Cd(II), Co(II), Cu

28 ripping voltammetric (DPAdSV) techniques for preconcentration and determination of copper (II) ions i

29 oses a simple and sensitive approach for the preconcentration and determination of graphene oxide (GO

30 GO-SH seems to be ideal for fast and simple preconcentration and determination of heavy metal ions u

31 lication of this sorbent was investigated in preconcentration and determination of low concentrations

32 osed method was successfully applied for the preconcentration and determination of MEL in different r

33 d with HPLC-UV detection for fast extraction-preconcentration and determination of melamine in dairy

34 of a method using solid phase extraction for preconcentration and determination of mercury by cold va

35 nano-sized titanium oxides were applied for preconcentration and determination of Pb(II) in aqueous

36 for the sensitive and selective separation, preconcentration and determination of Pb(II), Cd(II) and

37 e extraction (SPE) method for the separation/preconcentration and determination of some trace metals

38 d can be successfully applied to separation, preconcentration and determination of the pesticides (an

39 illary electrophoresis was optimized for the preconcentration and determination of Zn(II), Cu(II), Mn

40 ical method and applied as a sorbent for the preconcentration and extraction of trace amounts of Pb(2

41 of isotachophoresis (ITP), an electrokinetic preconcentration and extraction technique, onto nitrocel

42 ed with fluorescent proteins both for target preconcentration and for subsequent integration into imm

43 ted method is based on heated purge-and-trap preconcentration and gas chromatography/mass spectrometr

44 We report a method based on ion-exchange preconcentration and HPLC/mass spectrometry to measure a

45 sed on a cryogenic trapping which allows VOC preconcentration and provides an adequate pressure allow

46 A novel method for preconcentration and purification of the Alzheimer's dis

47 b(II) ions, the effect of variety of ions on preconcentration and recovery of Pb(II) ions were also i

48 A SuperLig 620 column in the system enables preconcentration and separation of 90Sr from matrix and

49 For the first time, the simultaneous online preconcentration and separation of AA, AS and GL using a

50 ymer modified silica fiber was also used for preconcentration and separation of europium metal ion fr

51 chophoresis (ITP), a powerful electrokinetic preconcentration and separation technique, to focus targ

52 -supported bifunctional polymer was used for preconcentration and subsequent quantification of Pu(IV)

53 The high sensitivity obtained with preconcentration and the non-chromatographic separation

54 everal analytical problems requiring analyte preconcentration and/or sample stabilization.

55 edefine regions in the fabric for successive preconcentrations and separations.

56 chromatographic separation, sample clean-up, preconcentration, and derivatization protocols.

57 measures bypassing steps such as extraction, preconcentration, and dilution of the sample.

58 ironmental concentrations (<5 mug/L) without preconcentration, and otherwise stable nature, sucralose

59 apid method to achieve ITP-based extraction, preconcentration, and purification of DNA from nanoliter

60 (6 for the extraction system and 10 for the preconcentration approach).

61 Sample preparation and target preconcentration are implemented on a PDMS-based microfl

62 equilibrium while limiting transient sample preconcentration at the base of the solution column.

63 The heavy metals were determined after preconcentration by inductively coupled plasma optical e

64 robust to allow its integration with sample preconcentration by isotachophoresis to achieve a limit

65 We achieved high preconcentration by mitigating evaporation induced dispe

66 Preconcentration by repeated trapping and isolation of a

67 HPLC-nanoESI-TOFMS (nUHPLC-nESI-TOFMS) after preconcentration by solid-phase extraction (SPE), thus e

68 munoaffinity extraction, tryptic digest, and preconcentration by solid-phase extraction (SPE).

69 depending on this hydrodynamic pressure, the preconcentration can be chosen, either in the cathodic s

70 nsors with BD-UNCD so that dielectrophoretic preconcentration can be performed directly at the biosen

71 measurement with ISEs avoids lengthy sample preconcentration, can be performed in situ, and is less

72 a simple, disposable PDMS micro/nanofluidic preconcentration chip for in vitro concentration-enhance

73 The proposed preconcentration-clean-up method is environmentally frie

74 Preconcentration coefficients of the analyte can reach 2

75 mposition, MNP surface modifications, target preconcentration conditions, and the effect that magneti

76 Electrokinetic preconcentration coupled with mobility shift assays can

77 with the help of a complete modeling of the preconcentration cycle.

78 rophotometric detection was proposed for the preconcentration-determination of mercury in water and f

79 A system combining this preconcentration device and a compact detection chamber

80 for designing Micro-Nano-Micro (MNM) fluidic preconcentration device based on ion concentration polar

81 We describe a preconcentration device that may be suitable for quantit

82 A preconcentration device that targets the volatile chemic

83 binding phase and a diffusive layer in this preconcentration device, respectively.

84 cluding one-step solvent-free extraction and preconcentration, direct thermal desorption, and enhance

85 igher detection sensitivity of 1 is due to a preconcentration effect by which the analytes are absorb

86 The sample preconcentration effect remains linear to over 3 mM (0.1

87 ology and PC regioisomer are consistent with preconcentration effects, which depend on the number of

88 ion (ROMP)-derived monoliths show equivalent preconcentration efficiency for the target drug vasoacti

89 Preconcentration efficiency of 100% was observed, allowi

90 Several parameters affecting preconcentration efficiency, including sample pH, contac

91 ersatility of the system, and increasing the preconcentration efficiency.

92 Utilizing the preconcentration (electrokinetic trapping) directly from

93 relative to C18 chains and to study how the preconcentration equilibrium can be controlled by the so

94 Preconcentration factor (PF) of 200 and the relative sta

95 The procedure has resulted preconcentration factor 36, sample frequency 20 h(-1) an

96 High extraction efficiency (90%), a 100-fold preconcentration factor and a detection limit of 5.0ng/L

97 tions of the method, the limit of detection, preconcentration factor and precision as RSD% were found

98 the optimal conditions, LOD (S/N=3) and LOQ, preconcentration factor and RSD% were found to be 1.5ngm

99 ides higher extraction efficiency and larger preconcentration factor for determination of pesticides

100 t methanol concentration (5% by volume), the preconcentration factor for pyrene into the particle was

101 limit of detection is 2.5 mug L(-1), and the preconcentration factor is 135.

102 Preliminary to this optimization, the preconcentration factor is discussed and a definition is

103 tion (3 s/b) between 0.12 and 1.6 mug L(-1), preconcentration factor of 100, and the relative standar

104 A preconcentration factor of 20 was reached, which was suf

105 Cu using a sample volume of 20mL, yielding a preconcentration factor of 20.

106 Due to the high preconcentration factor of 200, the optimized procedure

107 ion followed by centrifugal ultrafiltration (preconcentration factor of 3000).

108 Under the optimized conditions, a preconcentration factor of 65 and detection limit (3S bl

109 extraction efficiency of 99.0 +/- 0.5% and a preconcentration factor of 99 for U.

110 The preconcentration factor was 12.5.

111 The preconcentration factor was 200 for F-AAS and 100 for ET

112 Furthermore, the preconcentration factor was 299.3 and 137.1 for cadmium

113 ns, the limit of detection was 0.48ngmL(-1), preconcentration factor was 300, the sorption capacity o

114 The preconcentration factor was 360 for cadmium and the rela

115 The preconcentration factor was 60.

116 The preconcentration factor was 80.

117 Preconcentration factor was achieved as 80.

118 The preconcentration factor was calculated and found to be 1

119 n the range of 0.9-2.2 mug L(-1) (n=21), the preconcentration factor was calculated as 200 and the re

120 ve standard deviation was found 8.0% and the preconcentration factor was found as 25 for all analyte

121 (II) and 10 mug L(-1) Pb(II) levels, and the preconcentration factor was found to be 250.

122 The preconcentration factor, relative standard deviation, an

123 dIEF provides high sample preconcentration factors followed by immediate high-fide

124 der the optimal experimental conditions, the preconcentration factors in the range of 90-121were obta

125 mg L(-1) of RB and RG were 98% and 99%, with preconcentration factors of 327 and 330, respectively.

126 ood reproducibilities (RSDs13.53%, n=3) with preconcentration factors of 4 and 72 for PHE and PYR, re

127 Preconcentration factors of 62 and 220 were obtained wit

128 ause of the reduced size of the device, high preconcentration factors were obtained (up to 50-fold).

129 Under optimal conditions, the preconcentration factors were obtained in the range of 2

130 ion for metals 0.49-2.19 mug L(-1), and high preconcentration factors, 39-44, The efficiencies of the

131 d 4.0 to 8.3ngL(-1), respectively, with high preconcentration factors.

132 e pH to 8.6-8.8 leads to the definition of a preconcentration-free procedure with the lowest detectio

133 after multidimensional liquid chromatography preconcentration from a water extract of Se-rich yeast u

134 (Hg) trace determination based on direct Hg preconcentration from aqueous solution onto a gold nanop

135 e led to smaller-scale extractors that allow preconcentration from small volumes, detection within co

136 s is proposed to monitor the location of the preconcentration frontline.

137 mpling trimethylsilanol in air, as well as a preconcentration gas chromatography/mass spectrometry la

138 The reported preconcentration has been accomplished in our current wo

139 rements of delta(15)N and delta(18)O without preconcentration, (ii) eliminating interferences by othe

140 The potential of in-atomizer preconcentration in a DBD atomizer is outlined.

141 the DGT technique: it gives in situ analyte preconcentration in a simple matrix, with more quantitat

142 a limit of detection of 0.03 muM, for 5 min preconcentration in unstirred solution; this is a more t

143 The preconcentration is based on the phenomenon of concentra

144 The achieved online analyte preconcentration led to a 480-fold enhancement of detect

145 At the same time, a second preconcentration mechanism is provided by out-diffusion

146 O4@Chi-GQDs has high potential to be used as preconcentration method and can be reused 7times with hi

147 Novel preconcentration method can successfully be applied in f

148 In this work, an effective preconcentration method for the extraction and determina

149 A micelle-mediated preconcentration method has been developed for determina

150 A new preconcentration method in which a hydrodynamic pressure

151 solid phase extraction (SPE), separation and preconcentration method of some heavy metal ions, Cd(II)

152 acking is developed as a novel online sample preconcentration method to boost sensitivity with submic

153 A preconcentration method was developed by using a new ami

154 y we have described a gentle and noninvasive preconcentration method, based on electrostatic adsorpti

155 c absorption spectrometry with the optimised preconcentration method, respectively.

156 mug/kg) and the necessity of implementing a preconcentration method.

157 ied the coupled physicochemical processes of preconcentration, mixing, and chemical reaction kinetics

158 Lab-on-valve (LOV) system for separation and preconcentration of (99)Tc was developed.

159 With preconcentration of 60 mL of sample, an enhancement fact

160 In EC-XRF, electrochemical preconcentration of a species of interest onto the targe

161 ved as an effective extracting phase for the preconcentration of a wide range of polar and nonpolar a

162 reatment providing the merit of simultaneous preconcentration of all target radionuclides.

163 hat its LOD is controlled by the equilibrium preconcentration of an aqueous analyte ion as an ionopho

164 Additionally, the APE involved preconcentration of analytes, thus lowering the limit of

165 A simple procedure of lossless in situ preconcentration of arsane was developed.

166 The method was based on the preconcentration of arsenic by cloud point extraction (C

167 The method is based on the preconcentration of c-SWNTs and their direct on-filter R

168 The preconcentration of c-SWNTs is performed by microfiltrat

169 its application in an on-line system for the preconcentration of cadmium, cobalt, copper, lead and ma

170 A method of separation and preconcentration of cadmium, cobalt, copper, nickel, lea

171 A method of separation and preconcentration of cadmium, copper, nickel, lead and zi

172 A DLLME method for extraction and preconcentration of Cd and Pb from soft drinks and furth

173 resin was synthesized for the separation and preconcentration of Cd(II) and Zn(II) by SPE from bread,

174 is used to observe (in situ) the pH-gradient preconcentration of compounds into individual optically

175 yleneglycol, was used for the separation and preconcentration of copper(II) and lead(II) ions prior t

176 Although preconcentration of CSF samples with sucrose and NaCl ma

177 -GQDs) nanocomposite as an adsorbent for the preconcentration of Cu(II) in Thai food recipes or the s

178 ew microextraction method for separation and preconcentration of curcumin using deep eutectic solvent

179 s evaluated as a sorbent, for extraction and preconcentration of diazinon from aqueous media and cucu

180 ly effective material for the enrichment and preconcentration of europium or other trivalent lanthani

181 an optimization study was undertaken for the preconcentration of five 5'-mononucleotides using the ho

182 The method is based on the preconcentration of GO on a cellulose membrane and their

183 ion procedure is proposed for separation and preconcentration of gold nanoparticles (Au-NPs) from aqu

184 CPE) is a well-established technique for the preconcentration of hydrophobic species from water witho

185 lipid bilayer, can provide the isolation and preconcentration of ionizable compounds within the vesic

186 adsorbent for vortex-assisted separation and preconcentration of lead and copper from various food sa

187 em for the simultaneous online isolation and preconcentration of lead and strontium by sorption on a

188 an efficient solid phase for extraction and preconcentration of lead ions in complex matrixes.

189 nto a small collected area, which allows for preconcentration of low abundance material before analys

190 molecularly imprinted polymer (MMIP) for the preconcentration of melamine, a non-protein nitrogen foo

191 After preconcentration of mercury ions by an Au NP-Al(2)O(3) a

192 The developed technique can be applied for preconcentration of minute amounts of molecules in liqui

193 Efficient preconcentration of model peptides by SPE and sequential

194 chniques for extraction of field samples and preconcentration of organohalogens-known to be important

195 The synthesized nanocomposite was applied in preconcentration of Pb(2+) ions from various matrices.

196 a new solid extractant for the simultaneous preconcentration of Pb(2+), Cu(2+), Zn(2+) and Cd(2+) io

197 d and employed as solid phase extractant for preconcentration of Pb(2+), Cu(2+), Zn(2+) and Cd(2+) io

198 Adsorptive preconcentration of protamine at the membrane/water inte

199 ciency at 3-4 mol L(-1) HNO3, (ii) selective preconcentration of Pu(IV) in the presence of a trivalen

200 ensity ionic liquid and organic solvents for preconcentration of Sb and Sn.

201 It is therefore ideal for the isolation and preconcentration of single charge states of large protei

202 ALLME) has been described for the extraction/preconcentration of some triazole pesticides from differ

203 as evaluated as a sorbent for extraction and preconcentration of SPI from aqueous and sheep milk samp

204 se microextraction method for separation and preconcentration of sulfadiazine.

205 The analytical procedure involves preconcentration of technetium with coprecipitation, onl

206 he optimized procedure allows separation and preconcentration of the Au-NPs with an enrichment factor

207 Herein, we apply electrokinetic preconcentration of the neuropeptide onto patterned grap

208 ME) technique allowed the easy and effective preconcentration of the PAHs from the sample matrices.

209 dies confirmed very precise localization and preconcentration of the probe at the mitochondria.

210 Preconcentration of the reduced and permethylated glycan

211 tivity can be substantially enhanced through preconcentration of the target analyte around a semiperm

212 , employing conventional ultrafiltration for preconcentration of the target analytes followed by EMA-

213 develop a new method for the extraction and preconcentration of trace elements from edible oils via

214 extraction (DMSPE) method for the selective preconcentration of trace lead ions on oxidized multiwal

215 an efficient adsorbent for both removal and preconcentration of two important carcinogenic xanthine

216 iated extraction procedure was developed for preconcentration of uranium (U) in environmental aqueous

217 Storage and preconcentration of various molecules by molecular scave

218 ed stainless steel meshes for extraction and preconcentration of volatiles (Solid Phase Mesh Enhanced

219 procedure has been developed for extraction/preconcentration of zinc in various edible oils (canola

220 The preconcentration of Zn(2+) from aqueous solution was stu

221 olution, hydrophobization by derivatization, preconcentration on C18 cartridge, and LC-MS quantificat

222 Selective preconcentration, on-column focusing, temperature-progra

223 on mass spectrometric technique coupled with preconcentration onto nano- or microparticle-based traps

224 detection at 1.5 ppmv using 10 min of sample preconcentration (onto Molecular Sieve 5A) at a flow rat

225 Preconcentration optimizations including pH, dosage of a

226 cheaper analysis and no necessity of sample preconcentration or derivatization.

227 ghly concentrated interfering agents without preconcentration or heating of columns.

228 ly to the counting cell for analysis without preconcentration or separation, assuming that the sample

229 e LOD to 0.01 ng mL(-1) As employing a 300 s preconcentration period.

230 ed by using tosylactivated magnetic beads as preconcentration platform into a flexible hybrid polydim

231 fabrication technique, it is possible to get preconcentration plugs as high as 5000 fold with an orig

232 requires optimization of the parameters like preconcentration potential, time, stirring, inferences,

233 ly efficient and green procedure for analyte preconcentration prior to its determination by the micro

234 ed from the VOO matrix by using an optimised preconcentration procedure based on solid phase extracti

235 iologically-modified magnetic particles is a preconcentration procedure commonly integrated in magnet

236 -isotachophoresis (t-ITP) as an in-capillary preconcentration procedure in sheathless CE-MS further r

237 used to find the optimum conditions for the preconcentration procedure through response surface meth

238 y, a simple and rapid solid phase extraction/preconcentration procedure was developed for determinati

239 A clean up-preconcentration procedure was done prior to inject the

240 rix effects for improving the quality of the preconcentration procedure were optimized.

241 ng with the ion of interest (As(3+)), in the preconcentration process.

242 We investigate the preconcentration profiles of a fluorescein and bovine se

243 In addition to purification, IEF preconcentration provides at least a 10-fold increase of

244 detection is presented that integrates cell preconcentration, purification, polymerase chain reactio

245 tural waters providing easy-handling on-site preconcentration, reagent-free stabilization as well as

246 This preconcentration scheme has been used for some time in m

247 This allows for successive preconcentration, selection, and detection of miRNA.

248 action method was developed for simultaneous preconcentration-separation of Co(2+), Cr(6+), Hg(2+) an

249 otal analysis system composed of in-line DNA preconcentration, size separation, and single-molecule d

250 composition of extraction solvent, volume of preconcentration solvent, ultrasonic applying time, and

251 tion spectrometer (lambda = 1.65 mum) with a preconcentration stage was built and is described here.

252 The preconcentration stage, which employs a carbon molecular

253 the compounds and chloroform was used at the preconcentration stage.

254 This simple electrochemical preconcentration step improves the LOD of energy dispers

255 he use of RuNPs/GC eliminates the need for a preconcentration step in stripping voltammetry, which re

256 14 was successfully applied as an extractive preconcentration step prior to gas chromatographic-mass

257 The optimized conditions for preconcentration step were: the applied potential 70V, b

258 After preconcentration step, atomic absorption spectrometry wa

259 re transferred across the interface during a preconcentration step.

260 liquefied gas samples without the need of a preconcentration step.

261 reduction of the bismuth citrate during the preconcentration step.

262 les without the need of extensive cleanup or preconcentration steps as required for traditional prote

263 luorescent derivatization, purification, and preconcentration steps during the process.

264 hemical mixtures without sample treatment or preconcentration steps in a total time of 35 min.

265 te, "stand-off" sampling that do not require preconcentration strategies, such as the swabs commonly

266 A preconcentration system has been developed to determine

267 opment and analysis of a microfluidic sample preconcentration system using a highly ion-conductive ch

268 The calibration graph using the preconcentration system was linear up to 1000 nmol L(-1)

269 , and an enhancement factor of 14875 (25 for preconcentration system, 595 for hydride generation).

270 The technique relies on a two-stage preconcentration system, a low-volume capillary reactor

271 An automated analyte electroextraction and preconcentration system, which was used as the front end

272 The proposed preconcentration technique is based on the dropwise deli

273 Here we describe a microfluidic DNA preconcentration technique that does not require an exte

274 in this work as an electrokinetically based preconcentration technique, allowing injection of up to

275 e this problem by combining DQAMmiR with the preconcentration technique, isotachophoresis (ITP).

276 An in-line preconcentration technique, namely, transient isotachoph

277 Additionally, an online preconcentration technique, reversed electrode polarity

278 Here, we present a novel preconcentration technique--the coupling of a headspace

279 mplified sample stacking as an online sample preconcentration technique.

280 In-line preconcentration techniques are used to improve the sens

281 These digital isolation and preconcentration techniques will permit the same isolati

282 y Osteryoung square-wave voltammetry after a preconcentration time of 480 s.

283 The dependence of the ITSV response on the preconcentration time was monitored under the rotating-e

284 ally at ultratraces, by online coupling of a preconcentration (trap) column to an ion chromatography

285 oton conduit and gas cell with a custom-made preconcentration tube and an in-line UV-converter device

286 The first is a preconcentration unit providing the VOC recovery.

287 We present a new preconcentration unit, "Stheno II", coupled to a tunable

288 S of the VOC previously transferred from the preconcentration unit.

289 utyl chloroformate (IBCF) derivatisation and preconcentration using dispersive liquid-liquid microext

290 loped a macro-to-microscale interface called preconcentration using liquid intake by paper (P-CLIP).

291 The combination of online sample preconcentration via sweeping and selective mass spectro

292 ation with Eu(3+) via cyclic voltammetry and preconcentration voltammetry.

293 using manganese dioxide coprecipitation for preconcentration was developed for rapid determination o

294 MG preconcentration was linear up to a volume of 40 mL, obt

295 roved detection limit, independent of target preconcentration, was demonstrated for detection of Esch

296 separation and chromatography after initial preconcentration, we are now able to make atmospheric me

297 The limits of SAs detection using preconcentration were of 0.02-0.03 mug mL(-1).

298 e preparation, such as sample extraction and preconcentration, which is required in complex samples w

299 application of the ESI sprayer, we evaluated preconcentration with SPME and multistep elution prior t

300 nel, the measured fluorescence signal in the preconcentration zone increased linearly with time over