重量法与电感耦合等离子体发射光谱法测定复合肥料有效磷含量及不确定度比较  

Determination of available phosphorus content in compound fertilizers by gravimetric method and ICP-OES method and uncertainties comparison

作　　者：王新慧 殷炯 黄河清 WANG Xinhui;YIN Jiong;HUANG Heqing(Shanghai Institute of Chemical Industry Testing Co.,Ltd.,Shanghai 200062,China;Shanghai Research Institute of Chemical Industry Co.,Ltd.,Shanghai 200062,China)

机构地区：[1]上海化工院检测有限公司,上海200062 [2]上海化工研究院有限公司,上海200062

出　　处：《磷肥与复肥》2024年第1期42-46,共5页Phosphate & Compound Fertilizer

摘　　要：采用重量法和电感耦合等离子体发射光谱法(ICP-OES法)对复合肥料的有效磷含量进行测定,并对测量不确定度进行评定和比较。重量法测定结果w(有效磷)(20.71±0.07)%,扩展不确定度为0.07%(k=2),其不确定度主要来源于样品测量重复性;ICP-OES法测定结果w(有效磷)为(20.74±0.67)%,扩展不确定为0.67%(k=2),其不确定度主要来源于系列标准溶液的稀释。相比于ICP-OES法,重量法测定准确度更高,更稳定,适用于对准确度要求较高的测定;ICP-OES法适用于大批量测定。The available phosphorus content in compound fertilizers are determined by gravimetric method and ICP-OES method,and the measurement uncertainties are evaluated and compared.The determination result of available phosphorus by gravimetric method is(20.71±0.07)%,with an expanded uncertainty of 0.07%(k=2),which mainly comes from the measurement repeatability of the sample;The determination result of available phosphorus by ICP-0ES method is(20.74±0.64)%,with an extended uncertainty of 0.67%(k=2),which mainly comes from the dilution of the series of standard solutions.Compared to the ICP-OES method,the gravimetric method has higher accuracy and the results are stable,making it suitable for measurements with high accuracy requirements;The ICP-OES method is suitable for large-scale measurements.

关 键 词：重量法 电感耦合等离子体发射光谱法 复合肥料 有效磷含量 不确定度 

分 类 号：TQ440.72[化学工程—化学肥料工业] O657.31[理学—分析化学]