引用本文:翟有朋,顾云,张宗祥,杨文武,张永兵.GC和HPLC测定水中苦味酸的比较[J].环境监控与预警,2017,9(5):13-15
ZHAI You peng, GU Yun, ZHANG Zong xiang, YANG Wen wu, ZHANG Yong bing.Comparison of Using GC and HPLC to Determine Picric Acid in Water[J].Environmental Monitoring and Forewarning,2017,9(5):13-15
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GC和HPLC测定水中苦味酸的比较
翟有朋,顾云,张宗祥,杨文武,张永兵
泰州市环境监测中心站,江苏 泰州 225300
摘要:
建立了气相色谱法(GC)和高效液相色谱法(HPLC)测定水中苦味酸的分析方法,并对2 种方法进行比较。GC法检出限为0.000 4 mg/L,线性范围为0.0~0.050 mg/L,加标回收率为92.3%~94.1%,相对标准偏差为4.6%~8.9%。HPLC法检出限为0.02 mg/L,线性范围为0.10~5.00 mg/L,加标回收率为93.7%~96.5%,相对标准偏差为1.3%~2.0%。2种方法相比,GC法灵敏度较高,可用于痕量分析,但操作烦琐,不能有效地将苦味酸与硝基酚类干扰物分离;而HPLC法虽然灵敏度较差些,但简单、快速、稳定性好、准确度高,可有效地将苦味酸与硝基酚类干扰物分离。
关键词:  苦味酸  气相色谱法  高效液相色谱法    比较
DOI:
分类号:X832
文献标识码:B
基金项目:
Comparison of Using GC and HPLC to Determine Picric Acid in Water
ZHAI Youpeng, GU Yun, ZHANG Zongxiang, YANG Wenwu, ZHANG Yongbing
Taizhou Environmental Monitoring Center, Taizhou,Jiangsu 225300,China
Abstract:
Two analysis methods of picric acid in water were established by gas chromatography and high performance liquid chromatography, and the advantages and disadvantages of two methods were compared.The method detection limit of GC was 0.000 4 mg/L,the linear range was 0.0~0.050 mg/L,the recovery of standard addition was 92.3% to 94.1%, the relative standard deviation was 4.6% to 8.9%. The method detection limit of HPLC was 0.02 mg/L, the linear range was 0.10~5.00 mg/L, the recovery of standard addition was 93.7% to 96.5%, the relative standard deviation was 1.3% to 2.0%. GC had higher sensitivity and was suitable for trace analysis, but its operation was complex, and it couldn't separate picric acid and other nitrophenolic distractors effectively. HPLC was simple and rapid,it had good stability and high accuracy, picric acid and other nitrophenolic distractors could be separated effectively by this method.
Key words:  Picric acid  Gas chromatography  High performance liquid chromatography  Water  Comparison