摘要
于工作场所采用微孔滤膜采样夹以5L.min-1流量采集空气样品15min,用石墨炉原子吸收光谱法测定其中铬的含量。选择灰化温度为1 300℃,原子化温度为2 400℃。铬的质量浓度在5mg.L-1以内与其吸光度呈线性关系,检出限(3s/k)为6.81×10-4 mg.m-3。应用此法分析了采集的空气样品,加标回收率在98.8%～100.7%之间,相对标准偏差(n=6)在2.2%～2.4%之间。
Air sample over working-place was collected by using microporous filtering film with a flow-rate of 5 L·min-1 for 15 min,and the content of chromium in sample was determined by GFAAS.Temperatures selected for ashing and atomization were 1300 ℃ and 2 400 ℃ respectively.Linear relationship between values of absorbance and mass concentration of Cr was obtained in the range within 5 mg·L-1,with detection limit（3s/k） of 6.81×10-4mg·m-3.The proposed method was used in the analysis of air sample,values of recovery found by standard addition method were in the range of 98.8%-100.7%,and values of RSD′s（n=6） found were in the range of 2.2%-2.4%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2012年第3期303-304,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
