本刊1981年6期周正祥同志回答《关于69-1饮水消毒片的使用问题》一文中有几点值得商榷的地方。一、此片消毒成份是氯溴异氰尿酸,因此溶入水中还是有微量氯溴气和味的(不是无臭的),战士使用此片有反应者约占10%,这正是当前有关研究人员需待解决的课题。二、此片在室温密闭条件下保存5年,其氯溴有效量是有所损耗的(17～27%)。即使如此,对可饮的地面水消毒还是有效的。各单位库存69-1片,应按科学办事,对出厂后3年以上的使用前应抽样作含量测定。三、测定方法,用碘量法。一般卫生员都能操作,取5片(每片100毫克)溶于100毫升蒸馏水中,加入0.5克碘化钾(不需要加4克),同时加稀硫酸(1:10)2～5毫升,否则测定含量不准。如果消耗0.1N(相当2.5%)硫代硫酸钠溶液7毫升(即每片1.4毫升),说明仍有效,如果低于此值,消毒饮水可按此值加足。四、有些战士对此消毒水中的氯溴余味特 This issue of 1981 6 Comrade Zhou Zhengxiang answered “on the use of 69-1 drinking water disinfection tablets,” a article there are several points to be debatable. First, the film disinfection ingredients chlorine bromine isocyanuric acid, so dissolved into the water or a trace of chlorine bromine gas and taste (not odorless), warriors use this film has about 10% of responders, which is the current Researchers need to solve the problem. Second, the film was kept at room temperature for 5 years under confined conditions, the effective amount of chlorine bromine is some loss (17 ~ 27%). Even so, disinfecting drinkable surface water is still effective. All units of inventory 69-1, should act according to science, after the factory for more than 3 years before use should be sampled for determination. Third, the determination method, with iodometry. General practitioners can operate, take 5 (100 mg each) dissolved in 100 ml of distilled water, add 0.5 g of potassium iodide (do not need to add 4 grams), while dilute sulfuric acid (1:10) 2 to 5 ml, or determination Content is not allowed. If you consume 0.1N (2.5%) sodium thiosulfate solution 7 ml (ie 1.4 ml per tablet), the instructions are still valid, below this value, disinfection of drinking water can be added according to this value. Fourth, some soldiers on this disinfection of chlorine bromine special taste