关键词: 总碱含量, 比较, 精密度

Abstract: [Objective] To determine a method with accurate results and high precision by comparing the determination of the total alkali content in two alkaline cleaning agents,in order to improve the determination efficiency in the future. [Method] The determination results,endpoint determination,precision and uncertainty of the two methods were compared and analyzed,by industry standard method QB/T 4314—2023 Alkaline Cleaning Agents for Food Tools and Industrial Equipment and national standard method GB/T 4348.1—2013 Determination of Sodium Hydroxide and Sodium Carbonate Content for Industrial Use. [Result] There was no significant difference between the two methods,the precision of the industry standard method was higher than that of the national standard method,the color judgment of the endpoint of the industry standard method was better than that of the national standard method,moreover,the uncertainty of industry standard method was lower than that of national standard method. [Conclusion] The industry standard method was used to detect the total alkali content in alkaline cleaning agent with better precision,more accurate endpoint determination,and higher work efficiency．

Key words: total alkali content, comparison, precision