Product Overview

CODThe determination of⽤Closed-vessel catalytic digestion⽐⾊France, the determination of ammonia nitrogen⽤N/A⽒Reagents⽐⾊France, the determination of total phosphorus⽤Ammonium Molybdate Spectrophotometric Method⽐⾊，Total Nitrogen Determination Procedure⾏United StatesEPAAcknowledged⽅French change⾊Acid method,Selected⽔Quality Inspection Items⽬Luminescent emissionSignal⾄SensorRAMProcessor in⾏Data processing, directly calculating the sample concentration value.Per Unitmg/L indicated.

Principle of Detection

COD Determination Principle (Chromium Method): Under the presence of excess potassium dichromate and in a strongly acidic solution, with silver sulfate as a catalyst, the reduction substances in water are catalytically oxidized by heating. The COD value of the water sample is determined by establishing a relationship between the absorbance values of hexavalent or trivalent chromium and the COD value of the water sample.

Principle of Ammonium Nitrogen Determination (Nessler's Reagent Method): Ammonium nitrogen, existing in the form of free ammonia or ammonium ions, reacts with Nessler's reagent to form a pale brown complex. The ammonia nitrogen content in the water sample is determined by the proportionality between the absorbance of the complex and the amount of ammonia nitrogen.

Total Phosphorus Determination Principle (Ammonium Molybdate Method): After the sample is digested, all the phosphorus is oxidized into orthophosphates. In an acidic medium, orthophosphates react with ammonium molybdate to form phosphomolybdate polyacid in the presence of antimony salts, which is immediately reduced by ascorbic acid to form a blue complex. The total phosphorus content in the water sample is determined based on the absorbance of the complex.

Total Nitrogen Determination Principle (Alizarin Sulfate Method): The alkaline persulfate digestion process converts all forms of nitrogen into nitrates. After digestion, a masking agent is added to remove halogen-containing oxidizing substances. Then, the nitrates react with alizarin in a strongly acidic environment to form a yellow complex. The total nitrogen content in the water sample is determined by measuring the absorbance of the complex.

Product Features

1. CODMeasurement authority⾏National StandardsHJ/T399-2007Data is accurate and effective.

2. Determination of Ammonia Nitrogen⾏National Standards Data is accurate and effective. HJ535-2009

3. Total Phosphorus Determination Procedure⾏National StandardsGB11893-89Data is accurate and valid.

4. Total Nitrogen Determination Procedure⾏USAEPARecognized⽅French Change⾊Acid method, data accurate and effective.

5. Please provide the Chinese content you would like translated into American English.⼝Solid-state cold light source with stable optical performance.⽆The light source requires preheating, with a long lifespan.10Year.

6. Equipped withGlos⽔Quality Intelligent Inspection System, capable of...⾏Guided inspection and contamination⽔Sample batch inspection.

7. Resolve⽐⾊⼀Body⽆To be replaced⽐⾊⽫Inspection, Measurement⽅Simple by law.⾼Effective.

8. 4.3English⼨⾼Clear color screen, flat typeUIDesign⽅Please provide the Chinese content you would like translated into American English.⽤Customers quickly on board⼿Operation.

9. ABSMaterial⾼Strength, corrosion resistance, durability⾼Warm shell.

10. Inspection completed⾃Adjust print density, or select⼿Motion Printing Mode

11. Equipped with pre-mixed reagents, simply add the sample to the test tube for detection.⽔Samples further undergo dissolution.⾏Inspection.

12. Analyzers and Digesters⽤Split-body design; does not affect the stability of the light source system and optical sensors.。

Technical Specifications

Configuration List

Mainframe1 unit, 1 dissolver, 2 boxes of COD预制reagents (1 box of high and 1 box of low), 1 set of ammonia nitrogen reagents, 1 set of total phosphorus reagents.Total NitrogenReagents1 set，Micropipette1Needle, Test Tube Holder1 tube, 18 colorimetric tubes, 4 dilution bottles, 1 piece of flannel, 2 pairs of gloves, 1 user manual.