电感耦合等离子体原子发射光谱法测定枸杞中11种元素含量  

Determination of 11 Elements In Medlar by Inductively Coupled Plasma-Atomic Emission Spectrometry

作　　者：杨义钧[1] 

机构地区：[1]河南济源职业技术学院,济源454650

出　　处：《理化检验（化学分册）》2010年第4期430-432,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用电感耦合等离子体原子发射光谱法测定了枸杞中锌、铅、锰、铁、铬、镁、钙、铜、钠、钾和镉11种元素含量。选择硝酸(2+98)溶液作为介质,选择波长为213.86,220.35,257.61,259.94,267.72,279.08,324.75,317.93,589.59,766.49,226.50 nm 11条谱线依次作为测定锌、铅、锰、铁、铬、镁、钙、铜、钠、钾和镉的分析线,测得11种元素的检出限(3δ)均低于0.07 mg·L^(-1),相对标准偏差(n=11)在0.72%～2.40%之间。比较了常规湿法消化法、高压消化罐法和微波消解法处理样品对测定结果的影响。研究表明,高压消化罐法和微波消解处理样品精密度好。An ICP-AES method for the determination of Zn,Pb,Mn,Fe,Cr,Mg,Ca,Cu,Na,K and Cd in medlar was proposed.The HNO3（2＋98） solution was chosen as acid medium,and spectral lines with wavelengths of 213.86,220.35,257.61,259.94,267.72,279.08,324.75,317.93,589.59,766.49 and 226.50 nm were selected as analytical lines for the determination of Zn,Pb,Mn,Fe,Cr,Mg,Ca,Cu,Na,K and Cd respectively.Detection limits（3δ） for the 11 elements found were less than 0.07 mg·L^-1,and values of RSD＇s （n=11） were in the range of 0.72%-2.40%.The samples were treated by 3 different methods,including wet digestion method,pressurized digestion in a closed teflon vessel and microwave assisted sample digestion method.It was found that precision of analytical results obtained by the latter 2 methods were better than those obtained by the first one.

关 键 词：电感耦合等离子体原子发射光谱法 枸杞 样品消解 

分 类 号：O657.31[理学—分析化学]