煤的发热量测定过程中内部质控物苯甲酸定值试验

Benzoic Acid Quantitative Test for Internal Quality Control Substance in the Process of Determining Calorific Value of Coal

苯甲酸作为煤的发热量测定质控的标准物质,用量大且价格昂贵,为了更好地控制检测成本保证检测结果的准确可靠,力鸿检验集团各实验室购置一批无证苯甲酸作为内部质控使用,文章主要对无证苯甲酸的均匀性、稳定性进行试验,最终选择力鸿集团12家不同实验室进行定值试验。结果表明,无证苯甲酸具有良好的均匀性和长期稳定性。

Benzoic acid,as a standard substance for quality control of coal calorific value measurement,is widely used and expensive.In order to better control testing costs and ensure the accuracy and reliability of test results,each laboratory of Lihong Inspection Group purchased a batch of uncertified benzoic acid for internal quality control.This article mainly tests the uniformity and stability of uncertified benzoic acid,and ultimately selects 12 different laboratories of Lihong Group for quantitative test.The results indicate that uncertified benzoic acid has good uniformity and long-term stability.