磷矿石中氧化锰含量的测定分光光度法和容量法的比较  

Comparison of SpectropHotometric and Volumetric Methods for the Determination of Manganese Oxide Content inPhosphate Ores

作　　者：曹蔚 冯洪军 梁小凤 Cao Wei;Feng Hong Jun;Liang Xiaofeng(The 4th Geological Brigade,Guangdong Geological Bureau,Zhanjiang 524000,China)

机构地区：[1]广东省地质局第四地质大队,广东湛江524000

出　　处：《广东化工》2024年第19期192-194,共3页Guangdong Chemical Industry

摘　　要：在磷矿石中测定氧化锰含量时,分光光度法和容量法各有优缺点。分光光度法基于吸收光谱特性测定浓度,具有高准确性和良好重复性,但操作较为复杂,对仪器和技术要求高;适用于低浓度锰样品,但需解决其他物质干扰。而容量法通过滴定确定浓度,操作简便,适用于实验室条件,尤其是碘量法在控制下准确度高,适用范围广,能有效排除一些干扰物如三价铁离子。其重复性依赖于滴定精度。因此,选择方法时应考虑样品特性、准确性要求和操作便利性,并针对具体情况进行方法验证和优化,以确保结果的可靠性。Spectrophotometric and volumetric methods have advantages and disadvantages in the determination of manganese oxide in phosphate rock.Spectrophotometric method determines the concentration based on the absorption spectrum characteristics,with high accuracy and good reproducibility,but the operation is more complicated,with high requirements on instruments and technology;it is suitable for low concentration of manganese samples,but it needs to solve the interference of other substances.The volumetric method determines the concentration by titration,which is easy to operate and suitable for laboratory conditions.Especially,the iodometric method has high accuracy under control,has a wide range of application,and can effectively exclude some interferences such as trivalent iron ions.Its reproducibility depends on the titration accuracy.Therefore,sample characteristics,accuracy requirements and ease of operation should be considered when selecting a method,and method validation and optimization should be carried out for specific cases to ensure the reliability of the results.

关 键 词：磷矿石 氧化锰含量 分光光度法 容量法 测定 优缺点 比较 方法选择 

分 类 号：TQ[化学工程]