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.