High Range Auto-Dilution Ampoules for Colorimetric Analysis.

VACUettes ampoules are designed for highly concentrated samples. They employ a special 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. Attached to the tip of each ampoule, however, is a capillary pipet. It is calibrated to draw the correct volume of sample for one of four dilution factors: 25X, 50X, 100X and 1000X.

The VACUettes Method:
The ampoule is held in a horizontal position while the capillary tip contacts the sample. After the capillary pipet fills, it is immersed in a diluent (usually tap water) and the tip of the ampoule is snapped. The sample and diluent are drawn into the ampoule where they're mixed with reagent. The resulting color change can then be compared with liquid color standards to quantify results.