Ascorbic acid (vitamin C, C\u2086H\u2088O\u2086) is used in water treatment as an oxygen binding and reducing agent. In the food industry, ascorbic acid is used as an antioxidant and preservative to prevent the oxidation of food and extend its shelf life. <\/p>\n
In steam boilers and closed cooling systems, ascorbic acid is used in a similar way to Sulfite to bind dissolved oxygen in order to prevent corrosion. Ascorbic acid reacts with oxygen to form dehydroascorbic acid and thus protects pipes and system components from oxygen corrosion. <\/p>\n
The optimum ascorbic acid concentration in technical applications is typically 10-50 mg\/l C\u2086H\u2088O\u2086.<\/strong> In the food industry, the concentrations vary greatly depending on the application and must be controlled on a product-specific basis. <\/p>\n The CALDUR\u00ae Ascorbic Acid Test Set – Photometric is based on the ferrozine method. Ascorbic acid reduces iron(III) to iron(II), which then forms a violet color complex with ferrozine. After adding two reagents to the water sample, a characteristic violet color develops within 10 minutes (two 5-minute waiting times).<\/p>\n The color intensity is measured with a photometer (e.g. WINLAB Data Line or Spectro 3) at a wavelength of 560 nm and is proportional to the ascorbic acid concentration. The photometric method offers higher precision and objective measurement values compared to the visual color comparison method. <\/p>\n Important note:<\/strong> For boiler water or other alkaline samples, the pH value must first be corrected to pH 4.3 with hydrochloric acid.<\/p>\n Objective measurement without color comparison – ideal for laboratory use and GMP-compliant quality assurance<\/p>\n<\/li>\n Significantly more precise than colorimetric methods with color chart<\/p>\n<\/li>\n Can be extended by dilution up to 100 mg\/l – covers all areas of practical relevance<\/p>\n<\/li>\n Cost-efficient for daily checks in production facilities and quality assurance<\/p>\n<\/li>\n Automatic storage with date and time in the WINLAB photometer – GMP-compliant<\/p>\n<\/li>\n Reagent A: 120 months, reagent B: 96 months – economical for sporadic use<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":" CALDUR\u00ae Ascorbic Acid Test Set – Photometric What is ascorbic acid measured for? Ascorbic acid (vitamin C, C\u2086H\u2088O\u2086) is used in water treatment as an oxygen binding and reducing agent. In the food industry, ascorbic acid is used as an antioxidant and preservative to prevent the oxidation of food and extend its shelf life. In […]<\/p>\n","protected":false},"featured_media":6556,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[777,639,633],"product_tag":[],"class_list":{"0":"post-31847","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ascorbic-acid","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":"\nHow does the test set work?<\/h3>\n
Advantages of the CALDUR\u00ae test set<\/h3>\n
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