氧化锌现行标准锌含量测定方法的局限性

氧化锌在国民经济建设中是不可缺少的重要基础化工原料和新型材料，随着近年来伪劣氧化锌的出 现，使得氧化锌现行标准的局限性日益显现。通过理论基础和实验验证，对氧化锌现行标准中锌含量测定方法的局限性进行了论证。中国现行氧化锌标准中锌含量的测定方法仅局限于纯品或近乎纯品的氧化锌。如果被测氧化锌是含有大量杂质金属元素的伪劣氧化锌，那么按国家标准或行业标准定量分析时，由于大量杂质金属元素的存在，超出了掩蔽剂掩蔽的限量，使得锌含量的检测结果高于实际锌含量。因此，中国氧化锌现行标准目前无法正确评价伪劣氧化锌的质量水平。目前，急需针对伪劣氧化锌的关键检测技术开展研究，制定可行有效的伪劣氧化锌的鉴别与氧化锌含量的检测技术。

Limitations of determination method of zinc content in ZnO current standards

Zinc oxide（ZnO） is an indispensable and important basic chemical raw material and a new-type material in the development of national economy.Limitations of the ZnO current standards have been already revealed since the emergence of poor quality ZnO in recent years.By theoretical basis and experimental verification，the limitations of the current standard methods for the determination of zinc content in ZnO were demonstrated.China′s existing methods for determination of the zinc content in ZnO standards only limited to the pure or nearly pure product of ZnO.If the measured ZnO contained a large amount of impurity metal elements，the detection of zinc content was higher than the actual zinc content due to large number of metal impurity elements beyond the masking limit of masking agent.Therefore，current ZnO standards in China could not evaluate poor quality ZnO correctly.At present， research on the key testing technology for the inferior ZnO is urgent，so as to formulate a feasible and effective technology for the identification and content determination of poor quality ZnO.