摘要
建立了同时测定乙酸乙酯、乙酸丙酯、乙酸丁酯3种低碳酯的气相色谱法。以乙酸异戊酯为内标物,色谱柱为SK-1毛细管柱,进样口温度200℃,氢火焰离子化检测器,检测器温度250℃,载气为高纯氮气,流速1.0 m L/min,程序升温模式,分流比50∶1。结果表明,乙酸乙酯、乙酸丙酯、乙酸丁酯的质量浓度线性范围分别为1.445~7.225mg/m L(r=0.9998)、1.223~6.115 mg/m L(r=0.9999)、1.291~6.456 mg/m L(r=0.9999),定量限分别为0.203、0.167、0.188μg/m L。精密度、重复性、稳定性试验的RSD<5%;低、中、高3种质量浓度的平均加标回收率分别为96.8%~102.5%,97.4%~104.1%,98.1%~101.8%。本方法灵敏、准确,操作简单,分析速度快,可用于化学实验技术竞赛中乙酸乙酯、乙酸丙酯、乙酸丁酯的同时测定。
A gas chromatography method was established for the simultaneous determination of three low-carbon esters,such as ethyl acetate,propyl acetate,and butyl acetate.Using isoamyl acetate as the internal standard,the determination was performed on the column of SK-1 by temperature programming.The inlet temperature was 200℃,and hydrogen flame ionization detector was adopted with the temperature of 250℃;high purity nitrogen gas was used as carrier gas with flow rate of 1.0 mL/min;the split radio was 50:1.The linear range were 1.445~7.225 mg/mL for ethyl acetate(r=0.9998),1.223~6.115 mg/mL for propyl acetate(r=0.9999),and 1.291~6.456 mg/mL for butyl acetate(r=0.9999);the limits of quantitation were 0.203,0.167,0.188μg/mL respectively.RSDs of precision,reproducibility and stability tests were lower than 5%;the average recoveries rates for low,medium,and high concentrations were 96.8%~102.5%,97.4%~104.1%,and 98.1%~101.8%,respectively.This method is sensitive,accurate,easy to operate,and has fast analytical speed.It can be used for the simultaneous determination of ethyl acetate,propyl acetate,and butyl acetate in chemical experimental technology competitions.
作者
易承学
汪萍
朱邵晴
赵蒙蒙
Yi Chengxue;Wang Ping;Zhu Shaoqing;Zhao Mengmeng(School of Medical Technology,Zhenjiang College,Zhenjiang Jiangsu 212028,China;Zhenjiang Key Laboratory of Functional Chemistry,Zhenjiang Jiangsu 212028,China)
出处
《山西化工》
CAS
2024年第1期56-58,66,共4页
Shanxi Chemical Industry
基金
镇江市高等专科学校教学改革研究项目(2023ZD03)
江苏省高职院校绿色能源与低碳材料工程技术研究开发中心经费资助
江苏省表界面功能复合材料工程研究中心经费资助
江苏省高校自然基金面上项目(22KJB360019)。
关键词
化学实验技术
气相色谱法
乙酸乙酯
乙酸丙酯
乙酸丁酯
技能大赛
chemical experiment technology
gas chromatography
ethyl acetate
propyl acetate
butyl acetate
skills competition
