7 Reasons to Choose Hanna 1. Long shelf life: at least 2 years 2. Only 1 reagent to add to the vial 3. Accuracy at very low values less than 0.2 (scale 0.00-2.50) 4. The 16 mm vial allows optimal extraction (large headspace) 5. Rapid dissolution of any emulsions (thanks to the 16 mm vial) 6. Representative sample: 5 mL 7. Very practical procedure, with just one blank for the whole box Specifications HI96785-25 Range 0.00 to 2.50 mg/L (as CTAB) Resolution 0.01 mg/L Accuracy ±0.15 mg/L ±3% of reading at 25 °C Wavelength 420 nm Cuvette Type 13 mm diameter Method Bromophenol Blue Method Method ID #095 # of Vials 25 HI96785-25 Surfactants, Cationic Pre-dosed Reagent Set 13 mm Vial HI96785-25 is a kit of pre-dosed reagents in vials for the determination of Cationic Surfactants. There are vials for 25 tests to be used with Hanna’s HI801 and HI802 spectrophotometers. These high-quality reagents are manufactured in our state-ofthe-art facility and are clearly marked with lot number and expiration date for traceability. The method is Bromophenol Blue Method that assure good accuracy in the range form 0.00 to 2.50 ppm. The procedure involves the addition of a very representative sample volume (5 mL) and the use of 13 mm (internal diameter) cuvettes, with a longer optical path than many other vials on the market. This ensures accurate absorbance measurements and greater repeatability of results. Furthermore, the 13 mm vial has more headspace than other kinds of vial and this implies two great benets: optimal sample extraction and quick dissolution of any emulsions. Signicance of Use Cationic surfactants, unlike anionic and nonionic surfactants, carry a positive charge and are widely used in fabric softeners and disinfectants. Their presence in natural waters can harm aquatic ecosystems due to their toxicity to microorganisms and sh. In wastewater, monitoring cationic surfactants is essential for evaluating treatment e´ciency and ensuring environmental compliance. Most cationic surfactants nd use as disinfectants and sanitizers and include: Hexadecyltrimethylammonium bromide (CTAB), Benzalkonium chloride (BAC), Cetylpyridinum chloride (CPC),Benzethonium chloride (BZT). Application Water, wastewater, surface water, formulations, degreasing baths, wash solutions, process analysis. Method Bromophenol Blue Method: Determination of cationic surfactants by measurement of the Methylene Blue Active Substances (MBAS) index. Cationic surfactants react with methylene blue in an acid medium, this reaction results in salts that are extracted using chloroform. The yellow color of the organic phase is determined photometrically. Procedure guides on inside lid 11 COD and Vials 11.35 www.hannainst.com | Pre-dosed Reagents
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