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全自動定氮儀,半自動定氮儀的校準方法

時間:2022/3/10 9:03:07 瀏覽:

首先先解釋下半自動定氮儀的定義及用途:是一款自動加酸加堿加稀釋液的蒸餾裝置,滴定過程是需要手動完成,并通過人工計算氮含量的凱氏定氮儀器。適用于食品、飲料、醫藥、農林漁業、礦山、化工等生產企業,以及高等院校、科研院所、環境監測、土肥站、農機站、質量監督檢驗等科研檢測單位對食品、乳制品、天然橡膠、乳膠、種子、土壤、植株、飼料、礦石、污泥及化學沉淀物等樣品中對蛋白質含量的智能化測定。全自動定氮儀

  校準標準樣品硫酸銨(含氮量是已知的),硫酸銨是不需要消解直接可以蒸餾、滴定、然后通過計算出氮含量,所以是校準凱氏定氮儀的標準樣品。值得重點提醒的兩點:1、選擇(分析純)高純度硫酸銨 2、硫酸銨需要在105℃左右的高溫下進行長達2小時的烘干處理。



自動定氮儀
智能型定氮儀
液液萃取儀
全自動液液萃取儀
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