• High Range Visual Colorimetric Analysis


The VACUettes® Auto Dilution Method

Hold the ampoule in a horizontal position while the capillary tip contacts the sample (Step 1). After the capillary fills, immerse it in a diluent (usually deionized water); snap the tip off the ampoule (Step 2). The sample and diluent are drawn into the ampoule where they mix with the reagent (Step 3). The resulting color

 change can then be compared with the flat or round comparator to quantify results (Step 4).

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. Most comparators have a 2-year shelf-life. Safety Data Sheets (SDSs) are available on CHEMetrics' website. Click HERE

An open VACUettes test kit showing all of the contents. The kit is R-1501A for Ammonia.A hand holding A VACUettes ampoule with an R-1510C Ammonia box in the background.

VACUettes ampoules are designed for highly concentrated samples. They employ a patented auto-dilution feature that eliminates the need for a time-consuming and error-prone preliminary dilution. As a result, the entire test takes only 2 to 3 minutes, with a rate of accuracy comparable to a volumetric procedure. The basic design of these 7 mm ampoules is the same as CHEMets ampoules, however, a capillary tip is attached to the tip of each ampoule.

The VACUettes Test Procedure

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A graphic showing how to fill a VACUettes tip.
A graphic showing how to snap a VACUettes ampoule tip in the sample cup.
A graphic showing how to mix a VACUettes ampoule by moving it up and down so the bubble mixes the contents.
A graphic showing how to compare an ampoule against a comparator to get your test results.