Automated procedure for determination of ammonia in concrete with headspace single-drop micro-extraction by stepwise injection spectrophotometric analysis

TALANTA

卷:133

Article

Timofeeva, Irina¹  Khubaibullin, Ilnur¹  Kamencev, Mihail¹  Moskvin, Aleksey¹  Bulatov, Andrey¹ 

[1] St Petersburg State Univ, Inst Chem, St Petersburg 198504, Russia

关键词: Headspace single-drop micro-extraction;    Stepwise injection analysis;    Ammonia;    Concrete;   

DOI  :  10.1016/j.talanta.2014.04.081

来源: Elsevier

【 摘 要 】

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 mu L, 0.1 M 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 mu g kg(-1). The sample throughput was 4 h(-1). This system has been successfully applied for the determination of ammonia in concretes. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free