采用顶空单滴微萃取-逐步进样分光光度法测定混凝土中氨的自动化程序。
Automated procedure for determination of ammonia in concrete with headspace single-drop micro-extraction by stepwise injection spectrophotometric analysis.
作者信息
Timofeeva Irina, Khubaibullin Ilnur, Kamencev Mihail, Moskvin Aleksey, Bulatov Andrey
机构信息
Institute of Chemistry, Saint Petersburg State University, pr. Universitetskij 26, Saint Petersburg 198504, Russia.
Institute of Chemistry, Saint Petersburg State University, pr. Universitetskij 26, Saint Petersburg 198504, Russia.
出版信息
Talanta. 2015 Feb;133:34-7. doi: 10.1016/j.talanta.2014.04.081. Epub 2014 May 14.
A novel automatic stepwise injection headspace single-drop micro-extraction system is proposed as a versatile approach for automated determination of volatile compounds. The system application is demonstrated for ammonia determination in concrete samples. An ammonia gas was produced from ammonium ions and extracted on-line into 5 μL 0.1M H3PO4 to eliminate the interference effect of concrete species on the ammonia stepwise injection spectrophotometric determination. The linear range was 0.1-1 mg kg(-1) with LOD 30 µg kg(-1). The sample throughput was 4 h(-1). This system has been successfully applied for the determination of ammonia in concretes.
提出了一种新型自动分步注射顶空单滴微萃取系统，作为一种通用方法用于挥发性化合物的自动测定。该系统在混凝土样品中氨的测定中得到了应用。由铵离子产生氨气，并在线萃取到5 μL 0.1M H3PO4中，以消除混凝土成分对氨分步注射分光光度法测定的干扰效应。线性范围为0.1 - 1 mg kg(-1)，检测限为30 µg kg(-1)。样品通量为4 h(-1)。该系统已成功应用于混凝土中氨的测定。
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