| 摘要: |
| 以《水质 苯系物的测定 顶空/气相色谱法》（HJ 1067—2019）为基础，通过选取最优的顶空加热平衡温度和优化色谱柱升温程序，建立了自动顶空进样气相色谱法测定饮用水水源中低质量浓度苯系物的方法。该方法能够实现苯系物组分分离清晰，有效提高了检测效率。采用低质量浓度的苯系物系列溶液绘制校准曲线，在0.10～2.00 μg/mL范围内获得较好的线性关系，相关系数（r）为 0.999 4～0.999 9，检出限为0.001～0.002 μg/mL，相对标准偏差为1.5%～4.5%，加标回收率为880%～980%。该方法能够满足对饮用水水源中低质量浓度苯系物准确、高效的测定要求。 |
| 关键词: 自动顶空进样 饮用水 低浓度 苯系物 气相色谱法 |
| DOI： |
| 分类号:X832 |
| 基金项目:滁州市农业与社会发展类课题：沙河集水库饮用水安全评估体系的构建及应用（2021ZN004） |
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| Determination of Low Concentration Benzene Homologues in Drinking Water Source by GC with Automatic Headspace Injection |
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CHEN Linchang，XU Feng，WANG Fei，HU Yaqin，KANG Tao1,2,3
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1. Ecological Environment Monitoring Center of Chuzhou Anhui， Chuzhou， Anhui 239000，China;2. Chuzhou Ecological Environment Bureau， Chuzhou， Anhui 239000， China;3. Ecological Environment Monitoring Center of Anhui， Hefei， Anhui 230071， China
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| Abstract: |
| Based on the “Determination of Benzene Related Compounds in Water Quality Headspace/Gas Chromatography Method” (HJ 1067—2019)， by selecting the optimal headspace equilibrium temperature and optimizing the chromatographic temperature program， the baseline separation of eight components of benzene homologues was obtained， which effectively improves the detection efficiency. At the same time， the low concentration is used as the calibration point of the curve， and a good linear relationship was obtained at 0.10~2.00μg/mL. The correlation coefficients was between 0.9994 and 0.9999， the detection limits was 0.001~0.002μg/mL，the relative standard deviation ranged from 1.5% to 4.5%， and the recovery rates of standard addition were 88.0%～98.0%. It meets the requirements of accurate and efficient determination of low concentration benzene homologues in drinking water sources. |
| Key words: Automatic headspace injection Drinking water Low concentration Benzene homologues GC |
