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[目的]建立工作场所空气中铅测定的质量控制方法。[方法]通过对样品采集、样品处理、样品检测全过程的质量控制,确保原子吸收光谱法测定工作场所空气中铅及其化合物浓度的准确性。[结果]通过现场采样过程的质量控制,使采样效率达到98.3%(97.6%～98.6%),方法线性范围0.2～100.0μg/mL,相关系数均为0.9999,1%浓度的方法特征灵敏度为0.082μg/mL,微孔滤膜的平均空白测定值为(0.1104±0.0144)μg/mL,经质控样GBW(E)080211和GBW(E)080212检测,结果为(3.3±0.1)μg/张[参照值(3.1±0.6)μg/张]和(16.8±0.9)μg/张[参照值(17.0±1.5)μg/张],测定误差在容许范围内,高、低二套标准曲线直接测定比较(n=10,t=0.248,P>0.05),两法无统计学差异。[结论]该方法可作为工作场所铅测定质量控制的参考。
[Objective] To establish a method for quality control of lead in workplace air. [Method] Through the quality control of the whole process of sample collection, sample processing and sample testing, the accuracy of atomic absorption spectrometry for the determination of lead and its compound concentration in the air of the workplace was ensured. [Result] The sampling efficiency was 98.3% (97.6% ~ 98.6%) through the quality control of on - site sampling process. The linear range of the method was 0.2 ~ 100.0μg / mL, the correlation coefficient was 0.9999, the method characteristic sensitivity of 1% concentration was 0.082 (0.1104 ± 0.0144) μg / mL for the microporous membrane and (3.3 ± 0.1) μg / mL for the GBW (E) 080211 and GBW (E) 080212, respectively [Reference value (3.1 ± 0.6) μg / sheet] and (16.8 ± 0.9) μg / sheet [reference value (17.0 ± 1.5) μg / sheet]. The measurement error was within the allowable range and the two sets of high and low standard curves were directly measured Comparison (n = 10, t = 0.248, P> 0.05), no significant difference between the two methods. [Conclusion] This method can be used as reference for the quality control of lead determination in the workplace.