论文部分内容阅读
用带微孔滤膜的空气采样器采集样品,以硝酸—高氯酸体系消解后,用石墨炉原子吸收法测定空气中铅的方法,以抗坏血酸和磷酸二氢氨作混合基体改进剂,热解涂层石墨管,塞曼扣背景。石墨炉法测定空气中的铅灵敏度、准确度高,方法的最低检出浓度是6.00μg/L,当采样体积为150L时,铅最低检出质量浓度为0.004mg/m3。
Samples were taken with an air sampler with a microporous membrane, and after digestion with a nitric acid-perchloric acid system, the lead in the air was determined by graphite furnace atomic absorption spectrometry. Ascorbic acid and diammonium phosphate were used as a mixed matrix modifier and the heat Solution coated graphite tube, Zeeman buckle background. Graphite furnace method for the determination of lead in air has high sensitivity and high accuracy. The minimum detectable concentration is 6.00μg / L. When the sample volume is 150L, the lowest detectable concentration of lead is 0.004mg / m3.