【摘要】 建立了非完全消化-火焰原子吸收光谱法快速测定指甲中镁、锌的分析方法,在低温下用浓硝酸消解样品。可获得均匀、透明的样品溶液。以空白溶液为参比,用工作曲线法测定。对样品处理条件、化学干扰、硝酸的影响、试液与空白溶液粘度一致性、背景吸收干扰及检出限进行了考察。测定结果的相对标准偏差小于2.9％,测定结果为灰化法一致,相对误差小于±2.0％。方法简便、快速、准确。更多还原

【Abstract】 A analytical method for rapid determination of magnesium and zinc in finger nail by noncomplete digestion-flame atomic absorption spectromety have been developed. The sample was digested in concentrated nitric acid under low temperature and a homogeneous and transparent solution of sample was obtained. The working curve method was applied to the determination and blank solution was used as reference.The pretreatment condition of sample,chemical interference,effect of nitric acid, identity of viscosity for test solution and its blank solution,background absorption interference and detection limit were studied.The relative standard deviations were found to be less than 2.9%.The test results were consistent with those obtained by ashing method.The relative errors between two method were less than ±2.0%.This method was convenient,apid and accurate.更多还原