Automated procedure for determination of ammonia in concrete with headspace single-drop micro-extraction by stepwise injection spectrophotometric analysis.
作者： Irina Timofeeva , Ilnur Khubaibullin , Mihail Kamencev , Aleksey Moskvin , Andrey Bulatov
DOI: 10.1016/J.TALANTA.2014.04.081
关键词:
摘要: Abstract A novel automatic stepwise injection headspace single-drop micro-extraction system is proposed as a versatile approach for automated determination of volatile compounds. The application demonstrated ammonia in concrete samples. An gas was produced from ammonium ions and extracted on-line into 5 μL 0.1 M H3PO4 to eliminate the interference effect species on spectrophotometric determination. linear range 0.1–1 mg kg−1 with LOD 30 µg kg−1. sample throughput 4 h−1. This has been successfully applied concretes.
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