Chlorine is the most commonly used disinfectant in the world for treating drinking water and swimming pool water. It reliably kills bacteria, viruses and other pathogens, thus ensuring hygienically safe water. In chlorination, a distinction is made between free chlorine and combined chlorine (chloramines), the sum of which is referred to as total chlorine. <\/p>\n
Free chlorine<\/strong> is the active, disinfecting form and should be between 0.1 and 0.3 mg\/l in drinking water. Combined chlorine<\/strong> is produced by the reaction of free chlorine with nitrogen-containing compounds (e.g. urea, ammonia) and has a significantly lower disinfecting effect. In swimming pools, combined chlorine is responsible for the typical “chlorine smell” and eye irritation. <\/p>\n Limit values according to the Drinking Water Ordinance:<\/strong> Regular measurement of both forms of chlorine is essential for effective disinfection while minimizing by-products. The CALDUR\u00ae Chlorine LR Test Set – Photometric enables the precise determination of free and combined chlorine with the WINLAB Data Line photometer. <\/p>\n The CALDUR\u00ae Chlorine LR Test Set – Photometric is based on the proven DPD method (N,N-diethyl-p-phenylenediamine). DPD reacts with free chlorine to form a pink-violet dye, the intensity of which is proportional to the chlorine concentration and is measured photometrically. <\/p>\n Measurement of free chlorine:<\/strong> After adding reagent A, a pink coloration develops immediately corresponding to the free chlorine content. The absorbance is measured photometrically. <\/p>\n Measurement of combined chlorine:<\/strong> After adding reagent C, the combined chlorine is also measured. The difference between total chlorine and free chlorine gives the combined chlorine content. <\/p>\n The photometric evaluation with the WINLAB Data Line photometer provides objective, highly precise measurement results. The DPD method is internationally recognized and complies with the DIN EN ISO 7393-2 standards and WHO recommendations. <\/p>\n Immediate results for free chlorine – ideal for daily routine checks<\/p>\n<\/li>\n Differentiated assessment of water quality and disinfection efficiency<\/p>\n<\/li>\n Perfect for drinking water monitoring and monitoring limit values<\/p>\n<\/li>\n Cost-efficient for daily checks in waterworks and industry<\/p>\n<\/li>\n Objective measurement results with high resolution – independent of subjective color assessment<\/p>\n<\/li>\n Standard-compliant according to DIN EN ISO 7393-2 – globally recognized reference method<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":" CALDUR\u00ae Chlorine LR test set (free + combined) – Photometric What is chlorine measured for? Chlorine is the most commonly used disinfectant in the world for treating drinking water and swimming pool water. It reliably kills bacteria, viruses and other pathogens, thus ensuring hygienically safe water. In chlorination, a distinction is made between free chlorine […]<\/p>\n","protected":false},"featured_media":31939,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[772,639,633],"product_tag":[],"class_list":{"0":"post-31937","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-chlorine","7":"product_cat-photometric-method","8":"product_cat-testsets-caldur-en","10":"first","11":"instock","12":"shipping-taxable","13":"purchasable","14":"product-type-variable"},"exclude_global_add_ons":[],"addons":[],"acf":[],"yoast_head":"\n
\n– Free chlorine: max. 0.3 mg\/l Cl\u2082
\n– Combined chlorine: max. 0.1 mg\/l Cl\u2082 <\/p>\nHow does the test set work?<\/h3>\n
Advantages of the CALDUR\u00ae test set<\/h3>\n
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