工作场所空气中二硼烷的等离子体发射光谱测定

Determination of diborane in the air of workplace by ICP-AES

目的建立工作场所空气中二硼烷的样品采集及测定方法。方法工作场所空气中的二硼烷用氧化剂浸渍活性炭管采集。采用体积分数为3％的H2O2解吸，采用等离子体发射光谱（ICP—AES）方法对溶液中硼进行定量。结果本方法采样效率为99．6％，二硼烷5．66μg和56．6μg加标水平的解吸效率分别为90．9％和99．5％，批内和批间精密度相对标准偏差均小于8．0％。标准曲线范围0．1～10．0μg／ml（以硼含量计），该方法空气中的二硼烷的最低检出浓度为0．0111mg／m^3（以采集15L空气样品计），最低检出浓度为O．035mg／m^3（以采集15L空气样品计）。结论该方法适用于工作场所空气中二硼烷的采集及浓度测定。

Objective A sampling method was established to collect diborane in the air of workplace and an ICP-AES method was developed to determine the Boron in desorbed solution. Method Diborane in the air of workplace was collected by solid sorbent tube filled with oxidant impregnated activated carbon. The adsorbed diborane was desorbed into 3% H2O2 aqueous, and then the desorbed Boron was determined by ICP- AES. Results The sampling efficiency of this method was 99.6% with the desorption efficiency of diborane with 5.660 μg and 56.6 μg spiked were 90.9% and 99.5%, respectively. Both the intra-and inter-precision RSD were less than 8%. The standard curve of this method ranged from 0.1 to 10.0 μg/ml （Boron）, and the LOD and LOQ were 0.011 mg/m^3 and 0.035 mg/m^3 （15L samples） respectively. Conclusion The method established was suitable for diborane sampling and determination in the air of workplace