DZ/T 0064.19-1993 (English Version) PDF

Scope: This standard specifies the method for the determination of copper by catalytic polarography. The standard applies to the determination of copper in groundwater. The minimum detection volume is 0.1ug, and the measurement range is 0.001~2.Omg/L. Generally common elements in groundwater do not interfere with the determination, but tin and more than 0.1 mg of arsenic, arsenic, and molybdenum have positive interference on the determination, which can be suppressed by adding glycine (a large amount of arsenic can be decomposed by sample concentration and heating, or oxidized to Pentavalent arsenic does not interfere with the determination. If the amount of tin is too high, add hydrobromic acid to volatilize it when the sample is heated). After adding ascorbic acid to the solution, ferric iron and tetravalent titanium can be reduced to low prices without interfering with the determination. Generally, the concentrations of these ions in groundwater do not reach the level of interference and can be ignored. Organic matter interferes seriously, and all samples need to be digested.

DZ/T 0064.19-1993 history

1993 DZ/T 0064.19-1993 Groundwater Quality Test Method Determination of Copper by Catalytic Polarography