石墨炉原子吸收光谱法测定工作场所空气中铬及其化合物
GFAAS Determination of Chromium and Its Compounds in Air Over Working-place
摘 要
于工作场所采用微孔滤膜采样夹以5 L·min-1流量采集空气样品15 min,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5 mg·L-1以内与其吸光度呈线性关系,检出限(3s/k)为6.81×10-4mg·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。
空气
工作场所
铬及其化合物
GFAAS
Air
Working-place
Chromium and its compounds
Abstract
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%.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2011/2/17
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备注李少旦(1975-),男,湖南邵阳人,主管技师,硕士,从事卫生检验工作。
引用该论文: LI Shao-dan,PENG Wei-fang. GFAAS Determination of Chromium and Its Compounds in Air Over Working-place[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2012, 48(3): 303～304
李少旦,彭卫芳. 石墨炉原子吸收光谱法测定工作场所空气中铬及其化合物[J]. 理化检验－化学分册, 2012, 48(3): 303～304
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参考文献
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【2】CRUMP C, CRUMP E, HACK K, et al. Dose-response and risk assessment of airborne hexavalent chromium and lung cancer mortality［J］. Risk Anal, 2003,23:1147-1163.
【3】PARK R M, BENA J F, STAYNER L T, et al. Hexavalent chromium and lung cancer in the chromate industry: a quantitative risk assessment［J］. Risk Anal, 2004,24:1099-1108.
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【5】曹海兰.火焰原子吸收法测定工作场所中总铬方法的研究［J］.现代预防医学, 2007,34(24):4720-4721.
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