摘要
HJ/T 30-1999《固定污染源排气中氯气的测定甲基橙分光光度法》适用于固定污染源有组织排放和无组织排放的氯气测定。然而在测定实际样品中发现,当测定环境空气及无组织的氯气时标准方法的测定下限偏高,会造成分析环境空气中的氯气样品一检出就超标的现象。实验对标准方法中标准曲线绘制、溴酸钾标准使用液的浓度、甲基橙吸收使用液配置浓度作了适当改进,结果表明,所得标准曲线线性关系较好,准确度和精密度均高,当采样体积为30L时,检出限能达到0.006mg/m3,定量测定下限为0.0198 mg/m3。
＂Stationary T 30-1999）＂ ,was applied to source emission-Determination of chlorine Methyl orange determine chlorine discharged by the stationary sources spectrophotometric method （HJ/ and fugitive sources, however,the detection limit exceeded the stipulated limit values of national standard. To low the determination limit, the improvement of the drawing of standard curve, the concentration of standard potassium bromated solution, and the concentration of methyl orange absorption solution were carried out in this paper. The results indicated that the improved method had a good correlative curve linearity, accuracy and precision were satisfactory and the detection limit was 0.006mg/m3, and the determination limit reached 0.0198 mg/m^3 when the sampling volume was 30L.
出处
《环境研究与监测》
2016年第2期29-35,共7页
Environmental Research and Monitoring
关键词
环境空气
氯气
标准曲线
甲基橙吸收使用液
测定下限
改进
Ambient air
Chlorine gas
Standard curve
Methyl orange liquid absorption use
Determination of the lower limit
Improvement
