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目的探讨使用中消毒剂75%酒精浓度的2种测定方法,并考察2种方法测定结果的差异性和实际应用问题。方法利用气相色谱法和比重法直接测定乙醇浓度,用统计学方法分析处理数据。结果气相色谱法测定的RSD为1.09%,加标回收率为99.3%;比重法测定的RSD为0.06%,加标回收率为101.0%。2法测定结果经t检验,可认为差异有统计学意义(t=5.74>t0.05(25)=2.06,P<0.05)。结论使用中消毒剂酒精浓度的范围较宽(65%～75%)之间,2法均可用于测定,比重法与气相色谱法相比具有分析速度快、重现性好、操作简单、无消耗等特点,更适合于基层单位和医院检测使用,但结果粗略,精确度较差。
OBJECTIVE To investigate the two methods for determining the concentration of 75% alcohol in disinfectant and to investigate the differences and practical application of the two methods. Methods Direct determination of ethanol concentration by gas chromatography and specific gravity method, statistical analysis of data processing. Results The RSD was 1.09% and the spiked recoveries were 99.3%. The RSD was 0.06% and the spiked recoveries were 101.0%. 2 test results by t test, the difference was considered statistically significant (t = 5.74> t0.05 (25) = 2.06, P <0.05). Conclusion The range of alcohol concentration in use disinfectant range (65% ~ 75%), 2 method can be used for determination, the proportion method compared with gas chromatography has the advantages of fast analysis, good reproducibility, simple operation, no consumption And other characteristics, more suitable for the grass-roots units and hospital testing, but the results are rough, the accuracy is poor.