K-7003 Nitrite

K-7003 Nitrite Vacu-Vials Kit is used to determine Nitrite levels from 0-1.00 ppm.

Nitrite Information

This kit requires the use of a CHEMetrics Direct-Readout Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell. Instrument sold separately.


Why Choose Vacu-vials?

CHEMetrics Vacu-vials self-filling ampoules are a great way to test for dissolved substances in liquid. Unlike our visual test kits, the Vacu-vials test kit allows you to obtain an instrumental result using the CHEMetrics Direct-Redout Photometers or any spectrophotometer capable of accepting a 13m diameter round cell. When using equipment from another manufacturer, set the spectrophotometer to absorbance mode, select the wavelength specified by the Vacu-vials kit instructions, and follow the test procedure. The K-7003 Nitrite Kit was designed to accurately measure the levels of nitrite in water from 0-1.00 ppm.ppm. 

Safe and Reliable Results

While traditional methods often require multiple steps and thorough preparation, these test kits allow you to obtain dependable results with a few simple steps. By simplifying the testing method, Vacuvials test kits reduce the potential for operator error. Additionally, each of the ampoules contained in the test kits is vacuum sealed which helps eliminate the problem of obtaining inaccurate results from stale or unstable reagents. These reagents are stored right in the tip of each ampoule and sealed in glass, thereby minimizing direct contact with the chemicals.

What's included:

  • 30 self-filling Ampoules
  • 25 mL Sample Cup
  • Ampoule blank
  • Instruction Manual


The K-7003 uses the Azo Dye Formation Method. With the Azo Dye Formation method, Nitrite diazotizes with a primary aromatic amine in an acidic solution to produce a highly colored azo dye. The intensity of the color is directly proportional to the concentration of nitrite in the sample. Nitrate will not interfere. Results are expressed as ppm (mg/L) NO2-N. 

Nitrite, an intermediate in the nitrogen cycle, is formed during the decomposition of organic matter but readily oxidizes to form nitrate. These processes occur in wastewater treatment plants, water distribution systems, and natural waters. Nitrites are useful as corrosion inhibitors, preservatives, pigments, and in manufacturing many organic preservative chemicals. A Maximum Contaminant Level of 1 mg/L has been established by the USEPA for nitrite-nitrogen in drinking water.


How to use:

1. Fill the sample cup to the 25 mL mark with the sample to be tested. 2. Place the Vacu-vial ampoule tip-first into the sample cup. Snap the tip and the ampoule will automatically fill.
3.To mix the ampoule, tilt it from side to side, allowing the bubble to travel from end to end. 4. Dry the ampoule
5. Wait 10 minutes for color development. 6. Insert the Vacu-vial ampoule into the photometer, flat end first, and obtain a reading in ppm.


WARNING! This product can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.


More CHEMetrics Kits for Nitrite

Chemets Kits
Product Number Method MDS Range Price
K7004 Azo Dye Formation 0.05ppm 0-1 & 1-10ppm $56.00
Product Number Method MDS Range Price
K7004D Direct Nesslerization 10ppm 0-50 & 60-600ppm $61.00
K7004A Direct Nesslerization 20ppm 0-120 & 120-1200ppm $61.00
K7004B Direct Nesslerization 100ppm 0-1000 & 1000-10,000ppm $61.00
K7004C Direct Nesslerization 5ppm 0-30 & 30-300ppm  $62.00
Product Number Method MDL Range Price
K7025 Ceric Sulfate Titrant with Ferroin Indicator 250 ppm 250-2500 ppm $33.00
K7050 Ceric Sulfate Titrant with Ferroin Indicator 500 ppm 500-5000 ppm $33.00



K-7003 Instructions

Nitrite Tech Sheet

Nitrite Information

More Information
Manufacturer CHEMetrics
Call For Price No
Gas Nitrite
4-20 mA Output No
Voltage Output None
Power Requirements 4 AAA Batteries
Datalogging No
Warranty 1 Year
Method Azo Dye Formation
Range 0-1.00 ppm as N
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