{"product_id":"hanna-instruments-hi-7214-25-pool-line-reagents-for-iron-high-range-25-tests","title":"Hanna Instruments HI-7214-25 Pool Line Reagents for Iron High Range - 25 tests","description":"\u003cp\u003e25 test reagents for use with Hanna Checkers.\u003c\/p\u003e\u003cp\u003eHI-7214-25 Pool Line Reagents for Iron High Range - 25 tests\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e0.00 to 5.00 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.01 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrecision\u003c\/td\u003e\n\u003ctd\u003e2% of reading ±0.04 ppm (mg\/L) @ 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eAdaptation of EPA Phenanthroline method 315B, for natural and treated waters. The reaction between iron and reagent causes an orange tint in the sample.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePLEASE NOTE:\u003c\/td\u003e\n\u003ctd\u003eIn some cases, samples may contain other parameters which may interfere with results\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterferences may be caused by:\u003c\/td\u003e\n\u003ctd\u003eAlkalinity: above 2,000 mg\/L (as CaCO3). May slow down colour development (negative error). To resolve this, neutralise the sample with diluted HCl. Calcium (Ca2+): above 10,000 mg\/L as CaCO3 Copper (Cu2+): does not interfere: reagent contains a masking agent. Magnesium (Mg2+): above 100,000 mg\/L as CaCO3 Molybdate Molybdenum: above 25 mg\/L (as Mo-MoO4) (positive error) Sample containing up to 50 mg\/L Mo-MoO4 may be measured if a reading is taken after 1 minute instead of 3 minutes. High Iron concentrations up to 200 mg\/L do not inhibit colour development; above 200 mg\/L colour development may be inhibited. High sulphide concentrations (S2-): high sulphide concentrations may interfere. To reduce sulphide: acidify the sample and boil for about 20 minutes, neutralise and adjust volume before measurements. Silica (SiO2): above 175 mg\/L (as SiO2). May slow down colour development (negative error)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640079720821,"sku":"HI-7214-25","price":10.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/hi-7214-25-pool-line-reagents-for-iron-high-range-25-tests.jpg?v=1791580746","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-7214-25-pool-line-reagents-for-iron-high-range-25-tests","provider":"Test All Water","version":"1.0","type":"link"}