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Quantification of Al and Si in Atmospheric Particulates by Inductively Coupled Plasma-Atomic Emission Spectrometry with Alkali Melting
Pages: 130-133
Year: Issue:  9
Journal: Environmental Science and Management

Keyword:  alkali meltingPM2.5 and PM10inductively coupled plasma-atomic emission spectrometry;
Abstract: 铝(Al)和硅(Si)作为颗粒物源分析的指示性元素,不易被酸消解出来,需采用碱融法进行前处理.样品膜于99.9%纯度银坩埚中灰化后用氢氧化钠融熔,酸溶液提取,将被测元素转化为可溶性盐.此种前处理方式可解决大气颗粒物滤膜中Al、Si易产生的溶解不完全等问题.当采样体积为150 m3,试样定容体积为50.0mL时,本方法所计算出的Al、Si元素的检出限分别为0.096 μg/m3、0.123 μg/m3,加标回收率在87.2%~105%之间,可以满足测定准确的需要,且设备简单,操作简便,适合批量样品的测定.
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