摘要
目的建立电感耦合等离子体发射光谱测定水果中钾（K）、钠（Na）、钙（Ca）、镁（Mg）、铁（Fe）、铜（Cu）、锌（Zn）、锰（Mn）、磷（P）9种元素含量的方法,并对13种水果中9种矿质元素的含量进行测定。方法样品经硝酸高压消解后采用电感耦合等离子体发射光谱仪（ICP-OES）测定水果中9种矿物质元素的含量。结果各元素检出限分别为：K 3 mg/kg,Na5 mg/kg,Ca 3 mg/kg,Mg 1 mg/kg,Fe 0.5 mg/kg,Zn 0.03 mg/kg,Cu 0.01 mg/kg,Mn 0.02 mg/kg,P 0.1 mg/kg;各元素线性良好,相关系数R〉0.999 5;方法精密度在0.7%~4.4%之间,国家标准参考物质的分析结果在证书值范围内;K、Mg、P 3种元素在香蕉中的含量都最高,Na在哈密瓜中含量最高,Ca在橙中含量最高,Fe在葡萄中含量最高,Zn、Mn在杨桃中含量最高;K、P、Ca、Mg 4种元素在水果中的含量均较高,其中K在各种水果中的含量最高。结论该方法快速、准确可靠,可用于水果中矿物质元素的同时检测。9种矿物质元素在不同水果中的含量分布不同,个人可根据对矿物质的需求,合理选择搭配水果的摄入。
[Objective]To establish a method for determination of 9 elements of potassium（K）,sodium（Na）,calcium（Ca）,magnesium（Mg）,iron（Fe）,copper（Cu）,zinc（Zn）,manganese（Mn）,phosphorus（P）,and detect their contents in 13 kinds of fruits. [Methods]After high-pressure digestion by HNO3 in closed-vessel,9 mineral elements were simultaneously determined by inductively coupled plasma optical emission spectrometer（ICP-OES）.[Results]The detection limits of K,Na,Ca,Mg,Fe,Zn,Cu,Mn and P were 3 mg/kg,5 mg/kg,3 mg/kg,1 mg/kg,0.5 mg/kg,0.03 mg/kg,0.01 mg/kg,0.02 mg/kg and 0.1 mg/kg respectively. The correlation coefficients R 〉0.999 5 with good linearity,the relative standard deviations of 9 mineral elements ranged from 0.7%-4.4%,the results of analyzing standard materials were all within the certificate values. The contents of K,Mg and P were highest in banana,the content of Na was highest in cantaloupe,the content of Ca was highest in orange,the content of Fe was highest in grape,the contents of Zn and Mn were highest in Carambola. The contents of K,Ca,Na and P were high in13 fruits and the content of K was highest. [Conclusion]The method is rapid,accurate and reliable which can be used to determinate 9 mineral elements in fruits simultaneously. The distribution of 9 mineral elements are different in 13 fruits,individuals should select the rational fruit intakes according to the demand for mineral elements.
出处
《职业与健康》
CAS
2015年第14期1900-1902,共3页
Occupation and Health
基金
深圳市科创委项目(项目编号:JCYJ20130329103949643)
