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Some of my colourimetric test methods require the sample to be heated after addition of the test reagents. Why is this heating required?

April 26, 2017addition heated heating methods reagents require sample Test

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Some of my colourimetric test methods require the sample to be heated after addition of the test reagents. Why is this heating required?

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Some of the reactions used to produce a colour change require heating to take the reaction to completion and a vial-heating block is used for this process. The following Aqualytic parameter tests require the use of a heater block: COD, TOC, total chromium, total nitrogen and total phosphate.