1992
DOI: 10.1080/03067319208028129
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The Use of Micro-HPLC and Capillary Zone Electrophoresis for the Analysis of Individual Raindrops

Abstract: A new sampling procedure for individual raindrops with volumes of 4 nl -4 p1 is presented. It is demonstrated that analyte concentrations in small volumes can be analysed usin! micro-HPLC and capillary zone electro horesis (CZE). Results for the analysis of cations such as Na', NH4+, K , Mg2+, Ca2', and anions such as Cl-, so4 , NO3 , N S and organic acids are given and discussed.

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Cited by 14 publications
(7 citation statements)
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“…Bächmann et al [73] wanted to analyze size-classified raindrops for both their cation and anion composition. According to their relative sensitivity analysis, the optimum sample volumes for conventional scale IC, capillary IC (0.5 -0.75 mm ID), and capillary zone electrophoresis (CZE, 75 lm ID) are: 50, 0.5, and 0.01 lL (these translate to spherical drop diameters of 4.6, 1.0, and 0.25 mm), respectively.…”
Section: Unique Applicability Of Capillary Icmentioning
confidence: 99%
“…Bächmann et al [73] wanted to analyze size-classified raindrops for both their cation and anion composition. According to their relative sensitivity analysis, the optimum sample volumes for conventional scale IC, capillary IC (0.5 -0.75 mm ID), and capillary zone electrophoresis (CZE, 75 lm ID) are: 50, 0.5, and 0.01 lL (these translate to spherical drop diameters of 4.6, 1.0, and 0.25 mm), respectively.…”
Section: Unique Applicability Of Capillary Icmentioning
confidence: 99%
“…[19][20][21][22][23][24] However, in many cases with alkali and alkaline earth metal cations as the only analytes, crown ethers, e.g., 18-crown-6 ether exhibiting a somewhat different partial complexation mechanism, yield attractive separations. [19][20][21][22][25][26][27][28][29][30][31] Other possible electrolyte additives for refining the separation selectivity are organic solvents such as methanol, 21,24,25,32 poly(vinylalcohol) 33 and polyethylene glycol. 23 The pH of the separation electrolyte has also to be carefully selected, taking due account of (i) its influence on ligand complexing ability; (ii) the inclination of the sample metal ions to undergo hydrolysis; and (iii) the degree of protonation for an electrolyte constituent providing UV absorbance background (see below).…”
Section: Cationsmentioning
confidence: 99%
“…Along with an evident requirement of high molar absorptivity, the ionic mobility of a cationic chromophore must be similar to those of the sample ions. A range of aromatic bases, including imidazole, 22,24,34 4-methylbenzylamine, 19,21 4-methylaminophenol, 27,28,31 creatinine 23,35 and, in earlier applications, Waters' proprietary visualising reagents, meet these requirements well.…”
Section: Cationsmentioning
confidence: 99%
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“…Ela tem se distinguido das demais técnicas utilizadas para o mesmo fim, principalmente no que se refere à versatilidade e simplicidade. Existem inúmeros trabalhos de comparação na literatura, tanto de EC versus CI, especificamente [7][8][9][10][11] , quanto de EC versus CLAE [12][13][14] . Nestes trabalhos as técnicas são avaliadas com relação a diversos aspectos.…”
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