Determination of arsenic in drinking water by fluorimetric method

INTRODUCTION

Lumex Instruments provides sensitive and selective fluorimetric method for the measurement of mass concentration of arsenic in drinking water samples using the FLUORAT-02 analyzer.

METHOD

The fluorimetric method is based on formation of a complex compound between arsenic (V) and pyrocatechol in weak acid medium, extraction of this compound with chloroform in a form of ion associate with Acridine Yellow G dye followed by measurement of fluorescence intensity of the extract using FLUORAT-02 analyzer displayed as arsenic concentration in mg/l. The result appears on the PC-operated FLUORATE software.

Samples need to be preserved by addition of nitric acid. Carry out the analysis within 24 hours after sampling. Not preserved sample should be analysed within 4 hours after sampling.