Ev. Yuferova et al., VARIATIONS IN THE BLANK SIGNAL IN THE ATOMIC-ABSORPTION DETERMINATIONOF ZN IN WATERS WITH LOW MINERAL-CONTENT, Journal of analytical chemistry, 52(9), 1997, pp. 819-821
The mathematical experimental design and the design of experiments by
variance analysis were used for revealing the causes of large variatio
ns in the blank signal in the atomic absorption determination of zinc
in waters with low mineral content. It is shown that distilled water i
s contaminated with zinc at all of the analysis stages, starting from
water production. Conditions for conducting a blank experiment in the
case of determining zinc traces are recommended.