FIELD: analytical methods. SUBSTANCE: sample to be analyzed is dissolved in water under conditions of heating at 42-44 C for 2 h. Resulting solution is treated with acetone solution of tetrachloro-p-quinone in presence of 1,4-dioxane and colored solution obtained is photometered. EFFECT: increased accuracy and accelerated procedure. 2 tbl
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Authors
Dates
2001-06-27—Published
1999-11-09—Filed