Determination of Aqueous Formic and Acetic Acids by Purge-and-Trap Analysis with a Needle-Type Extraction Device and Gas Chromatography Barrier Discharge Ionization Detector
Determination of Aqueous Formic and Acetic Acids by Purge-and-Trap Analysis with a Needle-Type Extraction Device and Gas Chromatography Barrier Discharge Ionization Detector
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DOI：
10.2116/analsci.34.201
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发表时间：
2018-02
影响因子：
1.6
通讯作者：
I. Ueta;Yohei Nakamura;S. Kawakubo;Yoshihiro Saito
中科院分区：
文献类型：
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作者：
I. Ueta;Yohei Nakamura;S. Kawakubo;Yoshihiro Saito
提出了一种利用针式萃取装置和气相色谱-阻挡放电电离检测器分析水样中的甲酸(FA)和醋酸(AA)的吹扫捕集方法。针状萃取器的萃取剂为活性炭基吸附剂Carboxen 1000。采集玻璃瓶中顶空气体的采样时间为5分钟，包括10毫升水样。顶空进样体积为100mL时，FA和AA的检出限分别为3.3mg·L·−-1和2.0mg·100mg·mg1。该方法基于吹扫捕集的原理，适用于复杂基质中水相FA和AA的测定，样品制备步骤简单、快速。将该方法用于果汁样品和二氧化碳电化学还原生成的脂肪酸的测定。
A purge-and-trap method using a needle-type extraction device and a gas chromatography–barrier discharge ionization detector for the analysis of formic (FA) and acetic acids (AA) in aqueous samples is presented. An activated carbon-based adsorbent, Carboxen 1000, was employed as the extraction medium for the needle-type extraction device. The sampling time was 5 min for collecting headspace gas in a glass vial, including 10 mL of an aqueous sample. The detection limits for FA and AA with a headspace sampling volume of 100 mL were 3.3 and 2.0 mg L^−1, respectively. Since the proposed method was based on purge-and-trap collection, it was suitable for the determination of aqueous FA and AA in complex matrices with simple and rapid sample preparation steps. The proposed method was applied to the determination of FA and AA in fruit juice samples and FA generated by the electrochemical reduction of carbon dioxide.