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target="_blank">土壤有機碳恒溫加熱器</a>是一種用于土壤科學研究的儀器，主要用于測定土壤中有機碳的含量。其工作過程主要包括以下幾個步驟：<div>　　</div><div>　　1、準備階段</div><div>　　</div><div>　　-樣品準備：首先，需要將采集的土壤樣品進行風干、研磨和篩分處理，得到均勻的土壤樣品。</div><div>　　-儀器預熱：接通電源，預熱儀器至恒定溫度，通常是180°C至200°C之間。</div><div>　　</div><div>　　2、加熱階段</div><div>　　</div><div>　　-樣品稱量：將適量的土壤樣品稱量并放入加熱器的石墨消解管中。</div><div>　　-添加試劑：向消解管中加入適量的濃硝酸和硫酸混合溶液，以破壞土壤中的有機物，將有機碳轉化為無機碳。</div><div>　　-消解過程：將裝有樣品和試劑的消解管放入加熱器中，關閉蓋子，開始加熱。在高溫和酸性條件下，土壤中的有機碳被氧化為二氧化碳，并隨氣流排出。</div><div>　　</div><div>　　3、恒溫加熱</div><div>　　</div><div>　　-溫度控制：加熱器的核心部分是溫度控制系統，它確保在整個消解過程中溫度保持在恒定水平。這個過程通常需要幾小時，具體時間取決于土壤樣品的復雜性。</div><div>　　-排放氣體：在加熱過程中，產生的二氧化碳氣體通過連接的管道排放到含有堿性溶液的吸收瓶中，被有效吸收。</div><div>　　</div><div>　　4、結束階段</div><div>　　</div><div>　　-冷卻取出：消解過程結束后，將消解管從加熱器中取出，冷卻至室溫。</div><div>　　-清洗處理：需要清洗石墨消解管和吸收瓶，以備下次使用。</div><div>　　</div><div>　　5、數據分析</div><div>　　</div><div>　　-計算含量：通過測量吸收瓶中堿性溶液的pH值或電導率，可以計算出土壤樣品中有機碳的含量。</div><div>　　</div><div>　　土壤有機碳恒溫加熱器的工作過程涉及樣品準備、恒溫消解、氣體排放和清洗等多個步驟。正確執行每個步驟對于獲得準確的測定結果至關重要。在實際操作中，還需要注意安全防護措施，防止酸性和堿性溶液對人體和設備造成傷害。</div> 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