Development of new methods for the analysis of single cloud-, fog- and raindrops by capillary electrophoresis

Tenberken, B.; Bächmann, K.

doi:10.1016/s0021-9673(97)00259-8

Cited by 23 publications

(8 citation statements)

References 23 publications

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“…In addition, during the sample pretreatment steps analyte loss or contamination in routine analyses is unavoidable. Besides the above-mentioned techniques, capillary electrophoresis (CE) has also drawn much attention for metal ion analysis [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Capillary electrophoresis of trace metals in highly saline physiological sample matrices

2003

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Trace metal ions in highly saline samples such as urine were determined with capillary electrophoresis (CE) without desalting or off-line preconcentration. By mixing with a dye, 4-(2-pyridylazo) resorcinol (PAR), the metal ions were converted into anionic complexes having strong absorbance near 500 nm. A large volume of the metal-PAR complex sample solution injected into a coated capillary was stacked isotachophoretically and separated under a reverse potential. The salt anion (chloride) and PAR in the sample matrix acted as the leading and terminating electrolytes, respectively. In a sample containing a 250 mM NaCl matrix, more than 400-fold enhancement in the absorbance detector response was realized compared to the normal CE injection mode. Combination of the dye complexation and isotachophoretic stacking provided excellent detection limits (S/N = 3) for three trace metal ions in the low ppb range (Fe(2+), 0.7 ppb, Ni(2+), 0.4 ppb; Zn(2+), 1.2 ppb) with absorbance detection. The migration time reproducibility was excellent (relative standard deviations: standard samples < 1%, urine samples approximately 1%). The proposed method is convenient and fast, and the sample analysis can be completed within 20 min.

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Section: Introductionmentioning

confidence: 99%

Capillary electrophoresis of trace metals in highly saline physiological sample matrices

2003

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“…As chromophore and buffer have been employed phtalate [11,15,18,62,67,72,73,91,98,100], benzoate [9,36,81,82,85,86], PDC [5,6,10,14,20,25,38,61,75], TMA [22,45,54,57,58,74], MES [16,31], PMA [36,37,41,82], 2,4-dihydroxybenzoic acid with e-aminocaproic acid [35,96], 1,2-dimethylimidazole and trimellitic acid [13], p-hydroxybenzoate [40,43,47,63], p-anisate [84], 3,5-dinitrobenzoic acid [42], salicylic acid with Tris [48,52], benzoic acid and Tris [107], NDC [39], ...…”

Section: Background Electrolytementioning

confidence: 99%

Capillary electrophoresis for short‐chain organic acids and inorganic anions in different samples

et al. 2003

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This review article is a comprehensive survey of capillary electrophoresis methods developed for the measurement of short-chain organic acids and inorganic anions in a wide variety of matrices, such as food and beverages, environmental, industry, and other applications, as well as clinical applications in body fluids such as urine, plasma or cerebrospinal fluid. Details of sample pretreatment and of electrophoretic conditions have been collected in tables, arranged by the type of matrix. Strategies employed for method development for the analysis of these compounds by capillary electrophoresis in real samples are discussed.

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“…CE has shown great promise for the determination of ionic species in wet deposition. [26][27][28]33,40,50,[71][72][73][74] A method for the determination of chloride, nitrate and sulfate in rain water using CE with nonsuppressed conductivity detection was developed and validated by Valsecchi et al 40 The analytical parameters measured in the validation procedure showed that the method can be applied to monitoring of wet deposition. The main limitation for the application of this method in routine analysis was that migration times are not reproducible.…”

Section: Rain Depositionsmentioning

confidence: 99%

Inorganic environmental analysis by capillary electrophoresis

Timerbaev¹,

Da̧bek-Złotorzyńska²,

Hoop³

1999

Analyst

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Development of new methods for the analysis of single cloud-, fog- and raindrops by capillary electrophoresis

Cited by 23 publications

References 23 publications

Capillary electrophoresis of trace metals in highly saline physiological sample matrices

Capillary electrophoresis of trace metals in highly saline physiological sample matrices

Capillary electrophoresis for short‐chain organic acids and inorganic anions in different samples

Inorganic environmental analysis by capillary electrophoresis

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