Preconcentration by flow reversal in conductometric sequential injection analysis of ammonium
作者： M. T. Oms , A. Cerdà , Victor Cerdà
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摘要: A simple sequential injection method for the determination of ammonium with conductometric detection is described. The sample and alkaline solution are sequentially aspirated into a single tubular channel mixed by flow reversal. formed ammonia permeates through gas permeable membrane collected on static acceptor solution. change in conductance related to concentration ions sample. use reversal influence residence time preconcentration studied. limit can be lowered from 1.5mg L−1 0.1 mg if successive used. relative standard deviation lower than 3%.
sci-hub.se 参考文章(11)
J.S. Canham, G. Gordon, G.E. Pacey, Optimization of parameters for gas-diffusion flow-injection systems Analytica Chimica Acta. ,vol. 209, pp. 157- 163 ,(1988) , 10.1016/S0003-2670(00)84558-4
Gregory D. Clark, David A. Whitman, Gary D. Christian, Jaromir Ruzicka, Walter L. Zielinski, Sample Handling and Pretreatment Using Flow Injection Analysis Critical Reviews in Analytical Chemistry. ,vol. 21, pp. 357- 375 ,(1990) , 10.1080/10408349008050849
Wolfgang Frenzel, Cheng-Yu Liu, Potentiometric and conductometric determination of ammonium by gas-diffusion flow injection analysis Fresenius Journal of Analytical Chemistry. ,vol. 342, pp. 276- 280 ,(1992) , 10.1007/BF00322169
Jaromir. Ruzicka, Thomas. Guebeli, Principles of stopped-flow sequential injection analysis and its application to the kinetic determination of traces of a proteolytic enzyme. Analytical Chemistry. ,vol. 63, pp. 1680- 1685 ,(1991) , 10.1021/AC00017A006
Thomas. Guebeli, Gary D. Christian, Jaromir. Ruzicka, Fundamentals of sinusoidal flow sequential injection spectrophotometry Analytical Chemistry. ,vol. 63, pp. 2407- 2413 ,(1991) , 10.1021/AC00021A005
G. Schulze, C.Y. Liu, M. Brodowski, O. Elsholz, W. Frenzel, J. Möller, Different approaches to the determination of ammonium ions at low levels by flow injection analysis Analytica Chimica Acta. ,vol. 214, pp. 121- 136 ,(1988) , 10.1016/S0003-2670(00)80435-3
M. van Son, R.C. Schothorst, G. den Boef, Determination of total ammoniacal introgen in water by flow injection analysis and a gas diffusion membrane Analytica Chimica Acta. ,vol. 153, pp. 271- 275 ,(1983) , 10.1016/S0003-2670(00)85513-0
M.D.Luque de Castro, M. Valcárcel, Integration of separation and detection in continuous-flow systems Trends in Analytical Chemistry. ,vol. 10, pp. 114- 121 ,(1991) , 10.1016/0165-9936(91)85054-U
Jaromir Ruzicka, Graham D. Marshall, Sequential injection: a new concept for chemical sensors, process analysis and laboratory assays Analytica Chimica Acta. ,vol. 237, pp. 329- 343 ,(1990) , 10.1016/S0003-2670(00)83937-9
M GUZMAN, C POLLEMA, J RUZICKA, G CHRISTIAN, Sequential injection technique for automation of complex analytical procedures: fluorometric assay of factor thirteen. Talanta. ,vol. 40, pp. 81- 87 ,(1993) , 10.1016/0039-9140(93)80144-G