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测定饮用水中的剩余氯,是监督饮水消毒效果的重要手段。我军现有检水卫生装备中,大多应用邻联甲苯胺(即甲土立丁)比色法,该法灵敏度高,但假阳性多,特异性差,师团级78—1型和81型检水检毒箱中,是以立即比色和放置10分钟比色的办法来区分测定游离性余氯和总余氯,其准确度也比较差,而且该试剂已被认为是致癌物质,不宜再继续使用。近期,二乙基对苯二胺(即DPD试剂)比色法,国内也有应用的报道,灵敏度较高,使用得当也能区分测定游离性余氯和结合氯,但该法试剂稳定性差,不宜长期储存,在野外推广应用受到限制。为了满足师团卫生人员较全面评价消毒效果的需要,我们在研制成丁香醛连氮试纸片测定水中游离氯——供营连初级卫
Determination of residual chlorine in drinking water, is an important means of monitoring the effect of drinking water disinfection. Most of our existing military water sanitation equipment, ortho-tolidine (ie, a terbutaline Ding) colorimetric method, the method of high sensitivity, but the false positive and poor specificity, division level 78-1 and 81 Check the water chest detection, is based on the immediate colorimetric and placed 10 minutes colorimetric method to distinguish between the determination of free residual chlorine and total residual chlorine, its accuracy is relatively poor, and the reagent has been considered as carcinogens, not Continue to use. Recently, diethyl-p-phenylenediamine (DPD reagent) colorimetry, there are also reports of domestic application, high sensitivity, the use can also distinguish between the determination of free residual chlorine and chlorine, but the stability of the reagent is not appropriate Long-term storage, promotion and application in the field is limited. In order to meet the needs of the division of health personnel more comprehensive evaluation of disinfection, we are in the development of syringaldehyde nitrogen test paper Determination of free chlorine in water -