职业与健康 ›› 2026, Vol. 42 ›› Issue (1): 73-77.

• 论著 • 上一篇    下一篇

顶空箭型固相微萃取-气相色谱质谱联用法测定尿中2,5-己二酮

仇倩颖, 杨清华, 施逸岚, 叶青华, 王金鑫()   

  1. 南通市疾病预防控制中心,江苏 南通 226000
  • 收稿日期:2025-05-08 修回日期:2025-05-26 出版日期:2026-01-01 发布日期:2026-02-03
  • 通信作者: 王金鑫,E-mail:1091865784@qq.com
  • 作者简介:仇倩颖,女,工程师,主要从事理化检验工作。

Determination of 2,5-hexadione in urine by headspace arrow solid phase microextraction combined with GC-MS

QIU Qianying, YANG Qinghua, SHI Yilan, YE Qinghua, WANG Jinxin()   

  1. Nantong Center for Disease Control and Prevention,Nantong,Jiangsu 226000,China
  • Received:2025-05-08 Revised:2025-05-26 Online:2026-01-01 Published:2026-02-03

摘要:

目的 建立顶空箭型固相微萃取-气相色谱质谱联用方法(solid phase microextraction combined with gas chromatography-mass spectrometry,SPME-GC-MS)检测尿中2,5-己二酮,为职业接触正己烷人群的尿样检测提供更高效、简便、灵敏的检测手段。方法 取4 mL尿样于顶空瓶中,加入盐析剂,密封后上机,经色谱柱分离后进行SIM扫描定性,外标法定量。结果 对色谱柱类型、盐析剂添加量及箭型顶空固相微萃取等实验条件进行优化,选择HP-INNOWax色谱柱,加1.5 g NaCl,预热温度为60 ℃,萃取时间为30 min,尿中2,5-己二酮在0.05~5.00 μg/mL 浓度范围内线性良好,相关系数为0.997 2。方法 的检出限为0.01μg/mL,定量限为0.03 μg/mL。精密度试验的相对标准偏差在2.07%~6.19%,尿样的加标回收率在83.98%~97.62%。应用本法对8名职业正己烷接触者的尿样进行检验,有5名人员有低浓度检出,实验表明该法灵敏度高,结果准确可靠。结论 与WS/T 243—2004《职业接触正己烷的生物限值》卫生标准中的液液萃取方法相比,建立的顶空箭型固相微萃取-气相色谱质谱联用检测尿中2,5-己二酮的方法大大简化了实验步骤,前处理过程简便快速,能排除尿液复杂基质的干扰,可用于职业接触正己烷的人群尿样检测分析。

关键词: 顶空箭型固相微萃取, 气相色谱质谱联用, 尿, 2, 5-己二酮

Abstract:

Objective To establish a headspace arrow solid phase microextraction combined with gas chromatography-mass spectrometry(SPME-GC-MS) for the determination of 2,5-hexadione in urine,to provide a more efficient,simple and sensitive method for the detection of urine samples in people with occupational exposure to n-hexane. Methods 4 mL urine samples were collected in a headspace bottle,added salting agent,sealed and loaded on the machine. After separation by chromatographic column,SIM scanning was performed qualitatively and external standard method was used for quantization. Results After the column type,the amount of salting agent added and the conditions of arrow headspace solid phase microextraction were optimized,HP-INNOWax column was selected,1.5g NaCl was added,the preheating temperature was 60 ℃,and the extraction time was 30 min. The linearity of 2,5-hexanedione in urine was good in the concentration range of 0.05-5.00 μg/mL,and the correlation coefficient was 0.997 2. The limits of detection and the limits of quantification were 0.01 and 0.03 μg/mL,respectively. The relative standard deviation of precision test was 2.07%-6.19%,and the recovery rate of urine samples was 83.98%-97.62%. The method was used to test the urine samples of 8 occupational n-hexane contacts,and low concentration was detected in 5 of them. The experiment showed that this method had high sensitivity,and the results were accurate and reliable.Conclusion Compared with the liquid-liquid extraction method in the hygiene standard WS/T 243-2004 "Biological limit values for occupational exposure to n-hexane",the established SPME-GC-MS for the detection of 2,5-hexandione in urine greatly simplifies the experimental procedure,and the pretreatment is simple and rapid,which can eliminate the interference of complex urine matrix,and can be used for urine sample detection and analysis in occupational exposure to n-hexane.

Key words: Headspace arrow solid phase microextraction, Gas chromatography-mass spectrometry, Urine, 2, 5-hexanedione

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