气相色谱-质谱法测定木材中的五氯苯酚
石文超,陈峰,丁先锋,卢力,倪达美,宋彬彬
义乌市检验检疫科学技术研究院,浙江义乌 322000
Determination of pentachlorophenol in wood by gas chromatography-mass spectrometry
石文超,陈峰,丁先锋,卢力,倪达美,宋彬彬
Yiwu Inspection and Quarantine Academy of Science and Technology, Yiwu 322000, China
摘要:建立采用气相色谱-质谱法检测木材中五氯苯酚含量的方法。用甲醇为萃取溶剂超声提取木材中五氯苯酚,以气相色谱-质谱仪进行定量分析。五氯苯酚的质量浓度X在0.025~2.0 mg/L范围内与其色谱峰面积Y呈良好的线性关系,线性回归方为Y=394.4X-8 435,线性相关系数r2为0.999,检出限为0.03 mg/kg。在20,40,125 μg/L加标水平下,样品加标回收率为94.1%~101.8%,测定结果的相对标准偏差为0.90%~2.13%(n=6)。该方法的样品前处理简单,不需要衍生化,具有较高的准确度与精密度,可用于木材中五氯苯酚的测定。
Abstract:A method for determination of pentachlorophenol in wood by gas chromatography-mass spectrometry(GC-MS) was established. Methanol was used as extraction solvent for extraction, and then pentachlorophenol was detected quantitatively by GC-MS. The mass concentration of pentachlorophenol had good linear relationship with the chromatographic peak area in the range of 0.025-2.0 mg/L, the linear equation was Y=394.4X-8 435, the correlation coefficient was 0.999, and the detection limit was 0.03 mg/kg. Under the 20, 40, 125 μg/L addition level, the recovery was 94.1%-101.8%, and the relative standard deviation of determination results was 0.90%-2.13%(n=6). The method is simple in sample pretreatment and does not require derivatization with high accuracy and precision, and it can be used for the determination of pentachlorophenol in wood.
关键词:五氯苯酚;木材;气相色谱-质谱法
Keywords:pentachlorophenol; wood; gas chromatography-mass spectrometry
本文引用格式:
石文超,陈峰,丁先锋,等.气相色谱-质谱法测定木材中的五氯苯酚[J].化学分析计量,2019,28(5):49-52. SHI W C,CHEN F,DING X F,et al. Determination of pentachlorophenol in wood by GS-MS[J]. Chemical analysis and meterage,2019,28(5):49-52.
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