K-6923 Nitrate

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-6923 Nitrate Kit was designed to accurately measure the levels of Nitrate in water from 0-7.50 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      -30 cadmium foil packs      -3 mL syringe      -25 mL Sample Cup      -reaction tube with lid      -Ampoule blank      -Instruction Manual

Method:

The K-6923 uses the Cadmium Reduction Method. Nitrate is reduced to nitrite using cadmium as the reducing agent. The resulting nitrite concentration is then determined colorimetrically. This method is applicable to drinking and surface waters, as well as domestic and industrial wastes. Nitrite will interfere with this test. Results are expressed as ppm (mg/L) NO₃-N or NO₃. 

Nitrate is the most completely oxidized form of nitrogen. It is formed during the final stages of biological decomposition, either in wastewater treatment facilities or in natural water supplies. Low-level nitrate concentrations may be present in natural waters. However, a Maximum Contaminant Level of 10 ppm nitrate-nitrogen has been established for drinking water by the USEPA.

How to Use:

1. Using the syringe provided, dispense 3 mL of the sample to be tested into the empty reaction tube. Then dilute to the 15 mL mark with distilled water.	2. Empty the contents of one Cadmium Foil Pack into the reaction tube. Cap the reaction tube and shake it vigorously for exactly 3 minutes. Allow the sample to sit undisturbed for 2 minutes.
3. Pour 10 mL the reacted sample from Step 2 into the empty 25 mL sample cup, being careful not to transfer any cadmium particles into the sample cup.	4. Place the Vacu-vial ampoule tip first into the sample cup. Snap the tip and the ampoule will fill automatically.
5. To mix the ampoule, tilt it from side to side allowing the bubble to travel from end to end. Dry the ampoule and wait 10 minutes for color development.	6. Insert the Vacu-vial ampoule into the photometer, flat end first, and obtain a reading in ppm.

P6510:

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

More CHEMetrics Kits for Ammonia:

Downloads:

Nitrate Kits Instructions

Safety Data Sheet

Cadmium Reduction Tech Sheet

Nitrate Information