电感耦合等离子体发射光谱法同时测定水中7种金属元素  

Simultaneous Determination of 7 Kinds of Metal Elements in Water by ICP-AES

作　　者：温新欣[1] 王昱政[1] 

机构地区：[1]济南铁路疾病预防控制中心,山东济南250001

出　　处：《预防医学论坛》2014年第7期516-518,521,共4页Preventive Medicine Tribune

摘　　要：目的为满足水中多元素分析的需要,建立了电感耦合等离子发射光谱仪(ICP-AES)同时测定水中铁、锰、铜、锌、铅、镉、铝7种金属元素的方法。方法 2012～2013年采用轴向观测方式,同时采用同心雾化器加玻璃旋流雾化室,直接分析样品,减少了背景和其他元素干扰,提高了分析的灵敏度,并对济南铁路辖区的生活饮用水进行了检测。结果方法快速、灵敏,铁、锰、铜、锌、铅、镉、铝的检出限分别为0.30、0.04、0.18、0.60、2.60、0.15、0.20μg/L;线性良好,各元素线性相关系数均≥0.999 9;重现性好,不同浓度的相对标准偏差(RSD)为0.05%～2.06%;准确度高,回收率为95.41%～104.89%,并对标样进行测定,数值均在允许范围内。结论该方法可多元素同时测定,检出限低、分析速度快、线性范围宽、结果准确可靠、能够满足各类用水和水源水的测定要求,适用于日常分析。Objective To develop the method of ICP-OES for the simultaneous determination of seven elements including Fe,Mn,Cu,Zn,Pb,Cd,and Al in water. Methods The concentric nebulizer was used in combination with glass cyclone spray chamber,the axial observation mode,to analyze samples directly,reduce the interference of background and other elements,increase the sensitivity of analysis,and detect the drinking water within Jinan Railway Area. Results The method was rapid,sensitive,with the detection limit of Fe,Mn,Cu,Zn,Pb,Cd,and Al in 0.30,0.04,0.18,0.60,2.60,0.15,and 0.20μg/L;it had good linearity,with all linear correlation coefficients≥0.999 9;it had good reproducibility,relative standard deviation（RSD）of different concentrations ranged from 0.05%to 2.06%;the accuracy was high,the recovery rate was 95.41%-104.89%,when the standard samples were measured,values were within the allowable range. Conclusion The method can be used for simultaneous determination of multiple elements,with low detection limit,fast analysis speed,and wide linear range.The result is accurate and reliable;able to meet all kinds of water and source water measurement requirements,can be used for routine analysis.

关 键 词：电感耦合等离子发射光谱仪 水 轴向观测 金属元素 

分 类 号：R123.1[医药卫生—环境卫生学] O657.3[医药卫生—公共卫生与预防医学]