Envco – Environmental Equipment

To perform a test, immerse the CHEMet ampoule into the sample and snap off the tip (Step 1)- the correct volume of sample is automatically drawn in, filling the ampoule; a small inert gas bubble remains in the ampoule. To facilitate mixing the sample and reagent, tilt the ampoule back and forth so the bubble travels from end to end (Step 2). In 2 minutes or less, quantify the result by comparing the filled ampoule to the appropriate color standard(s) (Step 3). For higher concentrations, the flat comparator is used. For lower concentrations, the round comparator is used. The ampoule is compared with the standards until a color match is found. Kits include 30 ampoules, comparator(s), accessory solution(s) (when necessary), a sample cup, and instructions. Refill packs of 30 ampoules and accessory solutions are available separately. Comparators have a 2-year shelflife. Material Safety Data Sheets are provided in test kits. CHEMets ampoules are designed for maximum simplicity and accuracy. Each glass ampoule is 7 mm in diameter, 100 mm in length, with a tapered, pre-scored tip; reagents are vacuum-sealed inside.

Azo Dye Formation Method
Test kits containing CHEMets, VACUettes, or Vacu-vials ampoules are based on a colorimetric chemistry in which nitrite reacts to form a pink 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.

Ordering Information

Analyte: NITRITE (nitrogen)
Method: AZO DYE FORMATION METHOD.
Type: CHEMet

K-7004 Nitrite 0-2.0 ppm

Analyte: NITRITE (nitrogen)
Method: AZO DYE FORMATION METHOD.
Type: VACUettes

K-7004D Nitrite 0-55 ppm
K-7004A Nitrite 0-110 ppm
K-7004B Nitrite 0-220 ppm
K-7004C Nitrite 0-2200 ppm

Analyte: NITRITE (as NaNO2)
Method: CERIC SULFATE TITRANT WITH FERROIN AS THE INDICATOR
Type: Titret

K-7025 Nitrite 250-2500 ppm
K-7050 Nitrite 500-5000 ppm

Test kits contain 30 ampoules, comparators, accessory solutions (when necessary), snap cup, MSDS, and instructions.