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原子吸收光度法测定锑矿中微量铅的溶样方法,国标法是采用盐酸加硝酸溶样,氢溴酸除锑然后进行测定。此法除锑较完全,但需要反复蒸干几次才能进行测定,较麻烦。本文提出了酒石酸加王水直接溶样,不需蒸干的方法。利用酒石酸与锑络合,抑制了锑的水解方法简单、快速、精密度与准确度能满足要求,结果与国标法相吻合。一试剂与仪器 WYX-402型原子吸收分光光度计(沈阳产) 铅标准溶液:称1.000g纯铅(99.9995%)于烧杯中,加入硝酸(1+1)20ml,低温溶解后,用水稀至1000ml量瓶中,此液为Pb 1000μg·ml~(-1).吸取该液配成Pb 100μg·ml~(-1)。
Atomic absorption spectrophotometry method for the determination of trace lead in antimony ore sample method, the national standard method is to use hydrochloric acid plus nitric acid sample, the antimony hydrobromide then measured. This method except antimony more complete, but need repeated steaming several times to be measured, more trouble. This paper presents a method of direct tartaric acid and aqua regia sample without the need to evaporate. The use of tartaric acid and antimony complex inhibition of antimony hydrolysis method is simple, fast, precision and accuracy to meet the requirements, the results are consistent with the national standard method. A reagent and instrument WYX-402 atomic absorption spectrophotometer (Shenyang) Lead standard solution: Weigh 1.000g of pure lead (99.9995%) in a beaker, add nitric acid (1 +1) 20ml, dissolved in low temperature, diluted with water to 1000ml volumetric flask, the solution is Pb 1000μg · ml -1. Draw the solution and dubbed Pb 100μg · ml -1.