SO_(2)和NO混合标准气体在生态环境监测实验室比对中的应用

The Application of Standard Gas Mixture of SO_(2)and NO in Ecological Environment Monitoring Inter-laboratory Comparison

参考标准物质研制技术,采用称量法制备了一批瓶装氮中SO_(2)和NO混合标准气体,对混合气体的适用性进行了验证,并通过实验室比对考察了混合气体在生态环境监测领域的应用情况。结果表明,研制的SO_(2)和NO混合标准气体具有较好的适用性,可以使用混合气体开展实验室比对,并在实际生态环境监测领域实验室比对中取得了良好的应用效果。实验室比对结果显示,SO_(2)和NO评价结果为满意的实验室比例分别为79.4%和81.4%,表明目前我国气体SO_(2)和NO整体检测能力和技术水平良好。

Referring to the reference materials development technology,a patch of cylinders of SO_(2)and NO standard gas mixture in nitrogen was prepared by gravimetric method,and verified for applicability.The application of the gas mixture in ecological environment monitoring was investigated by inter-laboratory comparison.The results showed that the standard gas mixture was suitable to carry out inter-laboratory comparison and a good application effect was obtained in practical ecological environment monitoring inter-laboratory comparison.The laboratory comparison results show that the proportion of laboratories with satisfactory evaluation results for SO_(2)and NO are 79.4%and 81.4%,respectively,indicating that the overall detection ability and technical level of SO_(2)and NO in China are good.