白酒中氰化物能力验证方法比较

Comparison of verification methods of cyanide ability in liquor

中文关键词:  氰化物  白酒  盲样考核

英文关键词:cyanide  liquor  blind sample examination

中文摘要:

      目的 建立白酒中氰化物能力验证的检测方法。方法 分别采用分光光度法、连续流动法和气相色谱法对白酒中氰化物进行测定。分光光度法选定0~0.2 mg/L的浓度线性范围, 连续流动法、气相色谱法选定0.002~0.1mg/L的浓度区间对白酒考核样中的氰化物进行测定和加标实验, 并分析了3种方法对考核样测定的准确度和影响因素。结果 采用分光光度法、连续流动法和气相色谱法均能获得理想的检测结果, 其最低检出限分别为0.004、0.001和0.001 mg/L, 均能达到检测要求, 但操作的难易程度各不相同, 且对样品前处理有严格要求。结论 采用分光光度法、连续流动法和气相色谱法测定白酒考核样中的氰化物, 均能达到检测要求, 但需要严格控制检测前处理步骤和方法。

英文摘要:

      Objective To establish the detection method of cyanide ability verification in liquor. Methods The cyanide in liquor was determined by spectrophotometry, continuous flow method and gas chromatography. The linear concentration range of 0–0.2 mg/L was selected by spectrophotometry, and the concentration range of 0.002– 0.1 mg/L was selected by continuous flow method and gas chromatography to conduct the determination and labeling experiment of cyanide in liquor examination samples. The accuracy and influencing factors of determination for examination samples by three methods were analyzed. Results Satisfactory results were obtained by spectrophotometry, continuous flow method and gas chromatography with the minimum detection limits of 0.004, 0.001 and 0.001 mg/L, respectively, all meeting the detection requirements. However, the ease of operation varied and there were strict requirements on sample pretreatment. Conclusion The determination of cyanide in liquor examination samples by spectrophotometry, continuous flow method and gas chromatography can meet the detection requirements, but the pretreatment steps and methods should be strictly controlled.