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The microgram detection and determination of picric acid with sodium hypochlorite solution is based on its oxidation in alkaline solution and chlorination with excess of chlorine present in hypochlorite solution. A characteristic orange color is obtained, which can be used as a specific test. The sensitivity of the picric acid was enhanced by performing the resin spot test. This color reaction was applied for the determination of picric acid spectrophotometrically. 相似文献
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A test for the detection of certain ketones is based on the reaction with 1-chloro-2,4-dinitrobenzene in the presence of an anion-exchange resin in the OH(-) form, to give a violet colour on the resin bead surface. 相似文献
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