火焰原子吸收光谱法测定尘铅前处理方法的研究  

Pretreatment Methods of Lead Dust Determined by Flame Atomic Absorption Spectrometry

作　　者：姚朝英[1] 任兰[1] 徐笑寒[1] 

机构地区：[1]南京市环境监测中心站,南京210013

出　　处：《化学分析计量》2012年第6期50-52,共3页Chemical Analysis And Meterage

摘　　要：采用火焰原子吸收光谱法测定尘铅样品,在0～1.00 mg/L范围内样品中铅含量与吸光度呈良好线性关系,检出限为2.88μg/m3(按定容体积50 mL、采样体积400 L计)。采取酸煮法、索氏提取法、微波消解法、超声波提取法等4种前处理方法,在0.100,0.500,1.00 mg 3个质量水平对空白滤筒进行加标回收试验,4种前处理方法的回收率和测定结果的相对标准偏差分别为91.8%～97.4%,2.2%～3.2%;83.0%～86.8%,7.4%～10.3%;93.6%～97.2%,2.5%～3.7%;89.3%～90.9%,3.2%～4.5%,提取效果以酸煮法和微波消解法最佳,超声波提取法次之,索氏提取法最差。The lead dust sample was determined by flame atomic absorption spectrometry, the lead content in sample had good relationship with its absorbance in the range of 0-1.00 mg / L, the detection limit was 2.88μg / m3 （constant volume 50 mL and sampling volume 400 L）. With the sample pretreating methods of acid digestion, Soxhlct extraction, microwave digestion and ultrasonic extraction at 0.100 , 0.500, 1.00 mg levels of blank spiked samples, the recoveries and the RSD（n=5） were 91.8%-97.4% and 2.2%-3.2%, 83.0%-86.8% and 7.4%-10.3%, 93.6%-97.2% and 2.5%-3.7%, 89.3%-90.9% and 3.2%-4.5%, respectively. Effect of extraction by acid digestion and microwave digestion were better followed with ultrasonic extraction and Soxhlet extraction was the worst.

关 键 词：酸煮法 索氏提取法 微波消解法 超声波提取法 火焰原子吸收光谱法 尘铅 

分 类 号：O657.39[理学—分析化学]