我国食品部颁标准规定,葡萄酒中含铜量应为0.3～3.0ppm范围之内,含量过高会使酒质变浊缩短存放期,同时影响人体的健康。酒中铜的测定方法文献介绍较多,有比色法、溶出伏安法、微分脉冲极谱法、X射线荧光法及原子吸收光度法,但未见有离子选择电极电位法,由于电极法仪器设备简便,适用于中小型酒厂推广。我们采用SL-1型离子计和94—29型铜离子选择性电极做了系统的电极性能试验,测定葡萄酒中铜的线性范围可达0.1—5.0ppm,分析误差在±5％以下,变异系数在3％以内,回收率为87—105％。 (一)仪器与试剂 China’s food ministerial standards, wine, copper content should be within the range of 0.3 ~ 3.0ppm, the content will make the wine too cloudy to shorten the storage period, while affecting the health of the human body. There are many literature methods for the determination of copper in wine, including colorimetric method, stripping voltammetry, differential pulse polarography, X-ray fluorescence spectrometry and atomic absorption spectrometry, but there is no ion selective electrode potential method, the electrode method Equipment is simple, suitable for small and medium-sized wineries promotion. We use the SL-1 type ion meter and 94-29 type copper ion selective electrode system electrode performance test to determine the linear range of copper in wine up to 0.1-5.0ppm, the analysis error of ± 5%, the coefficient of variation Within 3%, the recovery rate is 87-105%. (A) instruments and reagents