GOST R 53228-2008 Non-automatic weighing instruments. Part 1. Metrological and technical requirements. Tests
GOST R ISO 5725 Accuracy (trueness and precision) of measurement methods and results. Part 6. Use in practice of accuracy values
ISO 7393-3:1990 Water quality; determination of free chlorine and total chlorine; part 3: iodometric titration method for the determination of total chlorine
GOST R 55683-2013 history
2013GOST R 55683-2013 Drinking water. Method for the determination of total chlorine in situ