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Hach. For determination of Chemical Oxygen Demand (COD) by the Mercury-Free Reactor Digestion Method, using TNTplus™ vials. Hach Method 10236 Range: 25-1000 mg/L COD. Reduce Errors with Bar-coded Vials No Reagent Blank Necessary Innovative Vial and Reagent Delivery Helpful package.

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Oct 14, 2010 · Pre-prepared low-range (3-50 ppm) or high-range (20-1500 ppm) vials are selected for the COD test based on expected results. Both ranges can be used if expected results are unknown. One vial is marked as a “blank,” and three or four vials are marked with known standard levels.

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Note: For best results, use the low range and ultra-low range vials for samples that have high chloride concentrations (near maximum concentration) and low COD concentrations. If sample dilution causes the COD concentration to be too low for accurate measurements, add 0.50 g of mercuric sulfate (HgSO 4) to each COD vial before the sample is added.

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COD Vials High Range 0-1500mg/L. Dichromate reactor digestion reagents for fast, easy, safe determination of low-, mid-, and high-range C.O.D. levels in wastewater. Premeasured reagent is packaged in flat-bottom ampules that are compatible with most spectrophotometers. Reagents have a two-year shelf life.

Hach 2125925 COD Digestion Vial, High Range (Pack of 25) Visit the Hach Company Store. 5.0 out of 5 stars. 1 rating. Price: $64.94 ($2.60 / Item) Enhance your purchase. This fits your . Make sure this fits by entering your model number.

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Pre-dosed vials the HANNA COD vials contains approx. 3 mL of pre-dosed reagent. The operator just needs to add a small quantity of the sample - 2 mL for LR and MR, and 0.2 mL for HR analysis. Quick and accurate measurements. With pre-dosed vials test preparation time is dramatically reduced.

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Easy to use and fast, safe to operate and versatile, Hach DRB reactors accommodate most test vials. Choose a dual block for running two programs at the same time. Reagents. Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand method in the world for NPDES reporting and for easy process monitoring.