Capillary zone electrophoresis of inorganic anions with conductivity detection

Kaniansky, Dušan; Zelenská, V.; Baluchová, Daniela

doi:10.1002/elps.1150171214

Cited by 38 publications

(26 citation statements)

References 37 publications

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“…The length of the capillary tube was 250 mm. The composition of the carrier electrolyte was 7 mmol / l succinate acid + 0.5 mmol / l bis -tri -propan, 5% ( w /v ) ( polyvinylpyrrolidone, 0.1% w /v ) methyl hydroxy ethylcellulose at pH =3.55 (Kaniansky et al, 1996 ) . The LOD of the SO 4 2 À analysis was 1.8 g/m 3 based on a sample flow of 2.9 m 3 and estimation of the method detection limit from the peak -to -peak noise ratio as described by Foley and Dorsey (1984) .…”

Section: Methodsmentioning

confidence: 99%

Personal exposure to particles in Banská Bystrica, Slovakia

Bräuer

Hrubá²,

Mihalíková³

et al. 2000

J Expo Sci Environ Epidemiol

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Epidemiological studies have associated adverse health impacts with ambient concentrations of particulate matter ( PM ) , though these studies have been limited in their characterization of personal exposure to PM. An exposure study of healthy nonsmoking adults and children was conducted in Banska Bystrica, Slovakia, to characterize the range of personal exposures to air pollutants and to determine the influence of occupation, season, residence location, and outdoor and indoor concentrations on personal exposures. Twenty -four -hour personal, at -home indoor, and ambient measurements of PM 10 , PM 2.5 , sulfate ( SO 4 2 À ) and nicotine were obtained for 18 office workers, 16 industrial workers, and 15 high school students in winter and summer. Results showed that outdoor levels of pollutants were modest, with clear seasonal differences: outdoor PM 10 summer / winter mean = 35 / 45 g / m 3 ; PM 2.5 summer / winter mean = 22 / 32 g / m 3 . SO 4 2 À levels were low ( 4 ± 7 g / m 3 ) and relatively uniform across the different sample types ( personal, indoor, outdoor ) , areas, and occupational groups. This suggests that SO 4 2 À may be a useful marker for combustion mode particles of ambient origin, although the relationship between personal exposures and ambient SO 4 2 À levels was more complex than observed in North American settings. During winter especially, the central city area showed higher concentrations than the suburban location for outdoor, personal, and indoor measures of PM 10 , PM 2.5 , and to a lesser extent for SO 4 2 À , suggesting the importance of local sources. For PM 2.5 and PM 10 , ratios consistent with expectations were found among exposure indices for all three subject groups ( personal > indoor > outdoor ) , and between work type ( industrial > students > office workers ) . The ratio of PM 2.5 personal to indoor exposures ranged from 1.0 to 3.9 and of personal to outdoor exposures from 1.6 to 4.2. The ratio of PM 10 personal to indoor exposures ranged from 1.1 to 2.9 and the ratio of personal to outdoor exposures from 2.1 to 4.1. For a combined group of office workers and students, personal PM 10 / PM 2.5 levels were predicted by statistically significant multivariate models incorporating indoor ( for PM 2.5 ) or outdoor ( for PM 10 ) PM levels, and nicotine exposure ( for PM 10 ). Small but significant fractions of the overall variability, 15% for PM 2.5 and 17% for PM 10 , were explained by these models. The results indicate that central site monitors underpredict actual human exposures to PM 2.5 and PM 10 . Personal exposure to SO 4 2 À was found to be predicted by outdoor or indoor SO 4 2 À levels with 23 ± 71% of the overall variability explained by these predictors. We conclude that personal exposure measurements and additional demographic and daily activity data are crucial for accurate evaluation of exposure to particles in this setting.

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Section: Methodsmentioning

confidence: 99%

Personal exposure to particles in Banská Bystrica, Slovakia

Bräuer

Hrubá²,

Mihalíková³

et al. 2000

J Expo Sci Environ Epidemiol

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“…To distinguish iodide, iodate, thyroxine and triiodthyronine, CZE was hyphenated with inductively coupled plasma mass spectrometry, a method with high sensitivity. Though no procedure has been published for the determination of iodide in urine by CZE so far, a series of studies on affecting iodide mobility with the aim to resolve iodide from other fast anions can be found in literature for various test mixtures [13][14][15][16][17][18][19][20][21][22][23][24][25][26][41][42][43][44][45][46][47][48][49][50], in waters [27,28,32,51], multivitamin supplement [29], antiseptics [52], dietary salt [30], blood plasma [31,40], or milk [30,31].…”

Section: Selection Of Electrolyte Systemmentioning

confidence: 99%

Fast and simple method for determination of iodide in human urine, serum, sea water, and cooking salt by capillary zone electrophoresis

Pantůčková

Křivánková

2004

Electrophoresis

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For the determination of iodide in urine, where 80-90% of consumed iodine is excreted, a fast, simple, and sensitive method of capillary zone electrophoresis was elaborated and tested also for additional complex matrices such as human serum, cooking salt, and seawater. Several approaches were examined for the separation of iodide from other macro- and microcomponents in the tested matrices, and the best results were obtained when host-guest interaction with alpha-cyclodextrin or ion-pairing with polyethylenimine was employed. In both cases comparable resolution and sensitivity were reached. Due to the relatively high price of cyclodextrin only the method with polyethylenimine was further optimized and a simple procedure enabling the determination of iodide in untreated human urine, serum, cooking salt, and seawater was elaborated. The samples were injected for 20 s at 0.5 psi (3.45 kPa) into a fused-silica capillary (0.18 mm ID, 50 cm effective length) coated with polyacrylamide (electroosmotic flow < 2 x 10(-9) m(2)V(-1)s(-1)) and filled with the optimized background electrolyte composed of 20 mM KH(2)PO(4) and 0.7% m/v polyethylenimine. For detection, UV absorption at 200 and 230 nm was measured. Concentration limits of detection reached at 230 nm were for human urine 0.14 microM, for human serum 0.17 microM, for seawater 0.17 microM, and for cooking salt 89 nM. Relative standard deviations of iodide peak area and height in all matrices ranged within 0.93 to 4.19%.

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“…The BGE composition for use in CZE in combination with CD has been previously investigated, focusing on the optimization of separation conditions and detector response [306,312,313]. Conductivity-based assays were also optimized in a number of practical works relevant to the analysis of the L-arginine/NO pathway [101,179,[247][248][249][313][314][315][316][317].…”

Section: Contact and Contactless Conductivity Detection (Cd Ccd C 4mentioning

confidence: 99%

Bioanalytical profile of the l-arginine/nitric oxide pathway and its evaluation by capillary electrophoresis

Boudko

2007

Journal of Chromatography B

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This review briefly summarizes recent progress in fundamental understanding and analytical profiling of the L-arginine/nitric oxide (NO) pathway. It focuses on key analytical references of NO actions and on the experimental acquisition of these references in vivo, with capillary electrophoresis (CE) and high-performance capillary electrophoresis (HPCE) comprising one of the most flexible and technologically promising analytical platform for comprehensive high-resolution profiling of NO-related metabolites. Second aim of this review is to express demands and bridge efforts of experimental biologists, medical professionals and chemical analysis-oriented scientists who strive to understand evolution and physiological roles of NO and to develop analytical methods for use in biology and medicine.

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Capillary zone electrophoresis of inorganic anions with conductivity detection

Cited by 38 publications

References 37 publications

Personal exposure to particles in Banská Bystrica, Slovakia

Personal exposure to particles in Banská Bystrica, Slovakia

Fast and simple method for determination of iodide in human urine, serum, sea water, and cooking salt by capillary zone electrophoresis

Bioanalytical profile of the l-arginine/nitric oxide pathway and its evaluation by capillary electrophoresis

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