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凯氏定氮仪的新应用_李业东
TH79
Li Yedong
(Henan Academy of Agricultural Sciences-Research Center of Agricultural Quality Standard and Testing Technology, Zhengzhou,
450002, China)
Abstract Kjeldahl nitrogen analyzer is commonly used in laboratory, which is generally used for the determination of
protein in food, dairy products, feed, agricultural-by products, and etc. Distillation is main function of nitrogen analyzer.
This paper expands new uses of nitrogen analyzer through improvement and utilization of distillation, thus it enables us
to test in a more convenient and quicker way compared with the conventional tests, such as the detection of volatile basic
nitrogen, sulfites, alcohol, formaldehyde, volatile acids, ammonia, and essential oils, and the extraction of flavors and
fragrances. This paper also concludes the steps, reagents and indicators needed for Kjeldahl and direct distillation.
Key words Kjeldahi nitrogen analyzer;Distillation equipment;Volatile basic nitrogen;Sulfi tes;Formaldehyde;Volatile
acids;Ammonia
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