金银分析方法纯银分析.doc

文档介绍：11纯银分析 -原子吸收补正法测定银(DeterminationofSilverbyAtomicAbsorptionSpectrometryafterPrecipitationwithSilverChloride) 、铅和铋(DeterminationofIron,LeadandBismuthbyAtomicAbsorptionSpectrometry) (DeterminationofGoldandCopperbyAtomicAbsorptionSpectrometry) -Br-PADAP吸光光度法测定锑(DeterminationofAntimonyby2-(5-Bromo-2-pyridylazo)-5–DiethylaminophenolSpectrophotometry) -电导法测定碳(bustion-ConductometricMethod) -碘酸钾滴定法测定硫(bustion-potassiumIodateTitration) -AES法测定杂质元素(DeterminationofImpurityElementsbyICP-AES) 〔DeterminationofImpurityElementsMetalbyMetalRodShapeSpectrographicMethod〕 (DeterminationofLeadbyDithizoneSpectrophotometry) (DeterminationofMagnesiumandZinebyFlameAtomicAbsorptionSpectrometry) (DeterminationofCadmiumbyFlameAtomicAbsorptionSpectrometry) (DeterminationofAntimonybyMelachiteGreenSpectrophtometry) (DeterminationofIronby1,10PhenanthrolineSpectrophotometry) -碘化钾吸光光度法测定铋(DeterminationofBismuthbyBrucine-IodideSpectrophotometry) (DeterminationofPhosphorusbyArsenicmolybdenumBlueSpectrophotometry) 、铋、锌等15种杂质元素(DeterminationofImpurityElementsbyChemicalSpectrographicMethod) 、铜、铁等11种杂质元素(DeterminationofImpurityElementsbyDirect-readingSpectrometryMethod) 、锌、硒等9种杂质元素(DeterminationofImpurityElementsbyInductivelyCoupledPlasma-MassSpectrometryMethod) 20参考文献 -原子吸收补正法测定银(DeterminationofSilverbyAtomicAbsorptionSpectrometryafterPrecipitationwithSilverChloride)试样用硝酸分解,在硝酸介质中,定量加入氯化钠溶液,使大部分银生成氯化银沉淀,经振荡澄清后,剩余的银离子,,使用空气-乙炔火焰测量银的吸光度。%~%银含量的测定。仪器及试剂原子吸收光谱仪:配备空气-乙炔火焰燃烧器及银空心阴极灯。振荡机:250次/min;试银瓶:200mL磨口瓶。银标准溶液():(质量分数≥%)置于100mL烧杯中,加入10mL硝酸(1+1),盖表皿,低温溶解完全,煮沸驱除氮的氧化物,冷却后移入1000mL容量瓶中用水定容。银标准试样:根据试样品位选用适当品号银标样。氯化钠标准溶液:移取340mL氯化钠饱和溶液置于20000mL下口瓶中,用水定容,静置4h。标定:(质量分数≥%)