豆科作物 苷氢氰酸的测定

[中文适用范围]： 该方法包括对糖苷进行酶解或酸水解后释放的酸进行蒸汽蒸馏，然后通过在氨介质中和钾存在下用硝酸银溶液直接滴定馏出物来测定所获得的酸的量。 碘化物，或在充分稀释的硝酸介质中并在铁（III）离子存在下，用硫氰酸铵溶液反滴定过量的硝酸银溶液。 附件描述了汞测定法的测定。 [外文原描述]： The method consists in steam distillation of the acid liberated after enzymatic or acid hydrolysis of the glycosides, followed by determination of the quantity of acid obtained, either by direct titration in the distillate with silver nitrate solution in an ammoniacal medium and in the presence of potassium iodide, or by back titration of an excess of silver nitrate solution with ammonium thiocyanate solution, in a suffiently diluted nitric acid medium and in the presence of iron(III) ions. An annex describes a determination by the mercurimetric method.