수질－킬달법에 의한 질소 측정방법－셀렌 무기화 후의 방법
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Water quality. Determination of Kjeldahl nitrogen. Method after mineralization with selenium
水质 凯氏氮的测定 硒矿化后的方法

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Water quality — Determination of Kjeldahl nitrogen — Method after mineralization with selenium
水质与灰分；凯氏氮的测定——硒矿化后的方法

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Water quality; determination of Kjeldahl nitrogen; method after mineralization with selenium (ISO 5663:1984); German version EN 25663:1993
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Water quality — Determination of total nitrogen after UV digestion — Method using flow analysis (CFA and FIA) and spectrometric detection
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