水样在1％磷酸介质下蒸馏40～50分钟,CN及氰络合物转化为HCN的形式逸出,然后用氢氧化钠吸收,从而与各种干扰杂质分离,吸收液在pH10.5～12.5的酸度下,以0.1M硝酸钾为离子缓冲剂,用氰离子选择性电极标准曲线沙测定。 The water samples were distilled in 1% phosphoric acid medium for 40 to 50 minutes, the CN and cyanogen compounds were converted into HCN, and then they were absorbed by sodium hydroxide to separate from various interference impurities. 12.5 acidity, with 0.1M potassium nitrate as an ion buffer, with a standard ion-selective cyanide ion curve of the sand measured.