Determination of Iodide-Ion in Laminaria by «water-in-oil» Microemulsion Electro-Kinetic Chromatography Coupled with Field-Enhanced Sample Injection
Abstract
A method of quantitative determination of iodide-ion in laminaria by «water-in-oil» microemulsion electrokinetic chromatography coupled with preliminary sample preconcentration procedure has been developed. On-line preconcentration technique, i.e., field-enhanced sample injection provided up to a 930-fold improvement in the detection sensitivity of inorganic anions. It was found that the full extraction of iodide could be achieved by the sample pretreatment of laminaria in a dry form. The developed method is rapid and easy to use (the time of analysis and sample pretreatment is 10 min and 16 min, respectively). Intra-day precision is found to be 5.2%, inter-day precision - 7.3%. The detection limit is 110 μg/kg of laminaria in a dry form (9.2 μg/kg in equivalent of fresh laminaria).
About the Authors
A. A. Derbina
МГУ им. М. В. Ломоносова
Russian Federation
Russian Federation
A. V. Pirogov
МГУ им. М. В. Ломоносова
Russian Federation
Russian Federation
I. D. Kargin
МГУ им. М. В. Ломоносова
Russian Federation
Russian Federation
M. V. Popik
МГУ им. М. В. Ломоносова
Russian Federation
Russian Federation
O. A. Shpigun
МГУ им. М. В. Ломоносова
Russian Federation
Russian Federation
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Review
For citations:
Derbina A.A., Pirogov A.V., Kargin I.D., Popik M.V., Shpigun O.A. Determination of Iodide-Ion in Laminaria by «water-in-oil» Microemulsion Electro-Kinetic Chromatography Coupled with Field-Enhanced Sample Injection. Industrial laboratory. Diagnostics of materials. 2015;81(6):5-9. (In Russ.)
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