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含碘食盐中碘的检验是高一化学新教材上的一个选做实验。国家标准规定食盐中碘酸钾含量（以碘计）为每kg食盐３５±１５（２０～１５）mg，折合成碘酸钾应为３４～８４mg。书上所用检验方法要配制KI溶液、淀粉溶液，并且瓶装KI价格昂贵。笔者尝试着对该实验进行了改进，取得了?
The test of iodine in iodine-containing salts is an elective experiment in a new chemistry textbook. According to the national standard, the content of potassium iodate in salt (in terms of iodine) is 35±15 (20 to 15) mg per kilogram of salt, and the conversion to potassium iodate should be 34 to 84 mg. The test method used in the book is to prepare KI solution and starch solution, and bottled KI is expensive. The author tried to improve the experiment and achieved?