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Jan 30, 2020 requirement. 16. How are the unused COD digestion vials stored? [Hach Method. 8000, 1979, Reactor Digestion Method Step 3].
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Poly aluminum chloride (PAC) with Poly ammonia (PA) coagulants was used to study the performance of the coagulation process of sludge wastewater obtained after
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A COD test typically involves digestion of a water sample in a sealed vial with potassium dichromate and sulfuric acid at 150oC for 2 hours.
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To measure free ammonia in water disinfected with monochloramine, use Hach Method 10200 for laboratory or field testing, or the APA 6000 Ammonia and
√ Phenolphthalein indicator. Dissolve 0.5 g of phenolphthalein in 50 ml of 95 per cent ethanol, and add 50 ml of distilled water. Add a dilute (e.g. 0.01
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