FIELD: analytical chemistry. SUBSTANCE: method involves application of sample on the thin-layer chromatography plate following by running mobile phase containing sodium dodecyl sulfate aqueous solution at concentration 0.08-0.01 mole/l and acetate-ammoniacal solution at pH 9.5-10.5. Method is used for chromoazurol purity assay by chromatography procedure. EFFECT: improved method of assay. 4 tbl
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