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UDC 543.33
Kashkarova G. P., Rybentsova I. A., Margolin S. L., Vorobyova E. V.
The experience of measuring aluminium ion in water
Summary
Practical use of the measuring techniques (specified in ПНД Ф 14.1:2:4.166-2000 and State Standard ГОСТ 18165-89) revealed a number of defaults in the process of determining low concentrations of aluminium in water. The technique of measurement is using the effect of aluminium-aluminon complex coloration with different chemical dosing methods. The experimental investigations showed that replacing successive addition of low concentrations of chemicals with reaction mixture improves the reproducibility of the results. However, the estimate accuracy of measurements (below 0.1 mg/l concentration) carried out with the certified aluminium determination techniques were not reached. Thus, the metrological performance of ПНД Ф 14.1:2:4.166-2000 and State Standard ГОСТ 18165-89 technique have to be revised the more especially that they have been widely used.
Key words
potable water , concentration , aluminium , aluminon solution , sample , absorbency
