湿法消解-火焰原子吸收光谱法测定餐具洗涤剂中铅的含量.pdf

第6期 冷波，等：湿法消解一火焰原子吸收光谱法测定餐具洗涤剂中铅的含量 ·79· 湿法消解一火焰原子吸收光谱法测定餐具洗涤剂中铅的含量 ‘ 冷波，郭桦，谭诗珂，郑晓军 (成都产品质量检验研究院有限责任公司，四川成都610000) 摘要：研究了用湿法消解餐具洗涤剂样品及火焰原子吸收光谱(FAAS)法测定餐具洗涤剂中的痕量Pb2+。对仪器的工作参数进 行了优化，探讨了混合酸消解体系、消解液用量等因素的影响。结果表明，在HNO，+HCIO。(16+4)混合酸能完全消解样品。 (RSD)为0．93％，加标回收率为98．30％一104％。该方法检出限低，精密度和准确度高，适用于餐具洗涤剂的测定。 关键词：火焰原子吸收光谱法；餐具洗涤剂；铅 中图分类号：0657．31 文献标识码：A 文章编号：1008—021X(2015)06—0079—02 DeterminationofLeadContentintheDish withWet washingDetergents Atomic Digestion——flameAbsorptionSpectrometry LengBo，Guo Hua，Tan鼽池，ZhengXiaojun Limited ofthe InstituteofProduct (The 610000，China) liabilityCompanyChengdu QualityInspection，Chengdu this atomic was forPbdeterminationinDish Abstract：In paper，flameabsorptionspectrometryemployed washing afterwet conditionsofflameatomic were andthe Detergentsdigestion．Instrument absorptionspectrometryoptimizedoptimal conditionswereselected．Theeffectsofthe mixedacidandthevolumeof solutionswere experimental type digesting investigated．The were 16mLof and4mLofHCl04．Therelativestandard completedigestionperformedusing HN03 forPb theflameatomic was0．93％andthe obtainedWere98．30％ deviations(RSDs)ofabsorption recovery spectromet