Envco – Environmental Equipment

The CHEMets Method
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.

In the standard DPD methodology, chlorine dioxide reacts with DPD (N, N-diethyl-p-phenylenediamine) to form a pink product. Interference from free Cl2 is prevented (up to 6 ppm Cl2) by the addition of glycine to the sample. Results are expressed as ppm (mg/L) ClO2.

Analyte: CHLORINE DIOXIDE
Method: DPD METHOD
Type: CHEMet
MDL PPM: 0.1

Ordering Information
K-2705 CHEMETS Chlorine Dioxide 0-2 & 2-10 ppm.
Test kits contain 30 ampoules, comparators, accessory solutions (when necessary), snap cup, MSDS, and instructions.

R-2705 Refill, 30 CHEMet ampoules
A-2700 Neutralizer Solution, six 10 mL bottles
A-0013 Sample Cup, 25 mL, package of six
C-2702 Comparator, 0-2 ppm
C-2710 Comparator, 2-10 ppm