{"product_id":"hanna-instruments-hi-93735-0-total-hardness-colorimetric-reagents-100-tests","title":"Hanna Instruments HI-93735-0 Total Hardness Colorimetric Reagents, 100 tests","description":"\u003cp\u003eThe HI-93735-0 are reagents for low, medium, and high range colorimetric determination of total hardness.\u003c\/p\u003e\u003cp\u003eThere are enough reagents for 100 tests to be used with Hanna’s HI-96735 Total Hardness EPA Portable Photometer. These high quality reagents are clearly marked with the lot number and expiry date on each packet for traceability.\u003c\/p\u003e \u003cp\u003eThe HI-93735-0 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. These reagents follow the EPA recommended method 130.1 in which the reaction between calcium, magnesium, and the reagents causes a red-violet tint in the sample.\u003c\/p\u003e \u003cp\u003eDepending on the range of the sample, one of three bottles of reagent A will be used, while reagent B and C are used for all ranges. By simply adding the range-appropriate bottle of liquid reagent A, two drops of reagent B, and the packet of reagent C to the sample, the reaction between calcium and magnesium and the reagents causes a colour change dependent upon concentration.\u003c\/p\u003e \u003cp\u003eThe intensity of colour is determined by the compatible HI-96735 \u0026amp; HI-97735 photometer and the concentration will be displayed. The results will be displayed in mg\/L (ppm) as CaCO\u003csub\u003e3\u003c\/sub\u003e. These reagents are designed to be used with samples that have an expected range of 0 to 250 mg\/L, 200 to 500 mg\/L, or 400 to 750 mg\/L as CaCO\u003csub\u003e3\u003c\/sub\u003e total hardness.\u003c\/p\u003e \u003ch3\u003e\u003c\/h3\u003e \u003ch3\u003eTip for an accurate measurement\u003c\/h3\u003e \u003cp\u003eIt is important that the sample does not contain any debris.\u003c\/p\u003e \u003cp\u003eWhen the cuvette is placed into the measurement cell, it must be dry outside and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI-731318 or a lint-free cloth prior to insertion.\u003c\/p\u003e \u003cp\u003eShaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.\u003c\/p\u003e \u003cp\u003eDo not let the reacted sample stand for too long after reagent is added, or accuracy will be lost.\u003c\/p\u003e \u003cp\u003eAfter the reading, it is important to discard the sample immediately, otherwise the glass might become permanently stained.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eBottles \u0026amp; packets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e100 tests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eAdaptation of the EPA recommended method 130.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640098627957,"sku":"HI-93735-0","price":152.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/hi-93735-0-hardness-total-colorimetric-method.jpg?v=1791581268","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-93735-0-total-hardness-colorimetric-reagents-100-tests","provider":"Test All Water","version":"1.0","type":"link"}