{"product_id":"hanna-instruments-hi-93720-03-hardness-calcium-calmagite-method","title":"Hanna Instruments HI-93720-03 Hardness Calcium, Calmagite Method","description":"\u003cp\u003eThe HI-93720-03 are reagents for the colorimetric determination of calcium hardness. There are enough reagents for 300 tests to be used with a compatible benchtop or portable photometer. These high quality reagents are clearly marked with the lot number and expiry date on each bottle for traceability.\u003c\/p\u003e\u003ch3\u003eReagents for hardness, calcium, calmagite method.\u003c\/h3\u003e \u003cp\u003eThe HI-93720-03 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. These reagents follow an adaptation of the calmagite method. The reaction between calcium and the reagents causes a red tint in the sample. By simply adding the reagents to the sample, a reaction will take place and a compatible benchtop or portable meter can be used to determine the concentration from the colour that is produced. The results will be displayed in mg\/L (ppm) as calcium carbonate (CaCO\u003csub\u003e3\u003c\/sub\u003e). These reagents are designed to be used with samples that have an expected range of 0.00 to 2.70 mg\/L calcium hardness.\u003c\/p\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\u003eDropper bottles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e300 tests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eAdaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, calmagite method. The reaction between calcium and reagents causes a red tint in the sample.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640098070901,"sku":"HI-93720-03","price":187.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/hardness-calcium-calmagite-method_85456d44-d27d-44af-9c83-33ad4dd37ebb.jpg?v=1791581246","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-93720-03-hardness-calcium-calmagite-method","provider":"Test All Water","version":"1.0","type":"link"}