CAJ | 학술논문

对离子色谱测定大气颗粒物PM2．5中Na＋、K＋、Mg2＋、Ca2＋、NH4＋等5种可溶性阳离子的方法作探讨，试验结果表明：石英滤膜的空白值较特氟龙滤膜高，尤其是Na＋、Ca2＋；样品前处理的超声时间以60 min为最佳；优化方法后标准曲线的相关性达0．999以上，对标准样品的测定值均在保证值范围内。当采样体积为标况下20 m3时，方法检出限Na＋、NH4＋为0．05μg/m3，K＋、Mg2＋、Ca2＋为0．1μg/m3，实际样品平行测定6次的RSD≤1．3％，加标回收率范围为87．5％～109％。
대리자색보측정대기과립물PM2．5중Na＋、K＋、Mg2＋、Ca2＋、NH4＋등5충가용성양리자적방법작탐토，시험결과표명：석영려막적공백치교특불룡려막고，우기시Na＋、Ca2＋；양품전처리적초성시간이60 min위최가；우화방법후표준곡선적상관성체0．999이상，대표준양품적측정치균재보증치범위내。당채양체적위표황하20 m3시，방법검출한Na＋、NH4＋위0．05μg/m3，K＋、Mg2＋、Ca2＋위0．1μg/m3，실제양품평행측정6차적RSD≤1．3％，가표회수솔범위위87．5％～109％。
Determination of five water-soluble cations, Na+, K+, Mg2+, Ca2+and NH4+in atmospheric particulates PM2.5 by ion chromatography was investigated .The result showed that the blank value of Quartz membrane was higher than that of Teflon membrane especially for Na +and Ca 2+determination .The best ultra-sonic time of sample pretreatment was 60 min.Correlation coefficient of standard curve of five cations were as high as 0.999 after optimizations .The determination values of the standard sample were within the guaranteed values.When the sampling volume was 20 m3 of standard conditions , the detection limit of Na +, NH4+was 0.05 μg/m3 , the detection limit of K +, Mg2+, Ca2+was 0.1μg/m3 .On the real sample testing , the precision was lower to 1.3%and the recovery rates were between 87.5%and 109%.