电感耦合等离子体发射光谱法测定水中有机碳和总磷

Simultaneous determination of total phosphorus and organic carbon in water by ICP-AES

目的：建立水中有机碳和总磷的电感耦合等离子体发射光谱分析方法。方法：加入盐酸、加热煮沸驱二氧化碳,以去除无机碳干扰,以电感耦合等离子体发射光谱法测定水中有机碳和总磷含量。结果：测定有机碳的检出限为0.6 mg/L（以C计）,测定总磷的检出限为0.02 mg/L（以P计）。测定有机碳时RSD在0.4%-3.2%之间,回收率在83.6%-109.0%之间。测定总磷时RSD在0.36%-1.95%之间,回收率在104.0%-114.0%之间。

Objeetion：A method for simultaneous determination of organic carbon and total phosphorus by inductively coupled plasma atomic emission spectrometry（ ICP -AES） was developed. Methods：In order to remove CO2 from water samples, HCI was added and samples were heated to boiling point of water. Results： The detection limits were 0. 6 mg/L for organic carbon and 0. 02 mg/L for total phosphorus, respectively. The precisions （RSD） were 0. 4% -3. 2% and 0. 36% - 1.95% for organic carbon and total phosphorus, respectively. The recoveries were 83.6% - 109.0% and 104.0% - 114. 0% for organic carbon and total phosphorus, respectively.