Since 1969, when CHEMetrics introduced the concept, the self-filling reagent ampoule has been simplifying water testing for analysts all over the world.  The key elements of colorimetric analysis -- reagent formulation, measurement and dispensing of the reagent, and measurement of the sample -- are all embodied in this unique, safe, dependable package.

The exact quantity of pre-formulated reagent needed for a single test is sealed under vacuum in the tapered tip ampoule.  The tip is scored for dependable fracture when you're ready to perform an analysis.  Simply snap the tip of the ampoule in the sample. It will fill instantly as sample flows into the tube and mixes with the color-forming reagent inside.  You can choose visual or instrumental methods to quantify your result.
 

How can self-filling ampoules save me $$$?
When the cost of performing a test is calculated, whether it's in the lab or out in the field, the key element is time - - the time it takes to get ready, the time it takes to do the actual test, and finally, the time it takes to clean up.  In all of these areas, CHEMetrics' ampoules save dollars, because time-consuming chores have been eliminated by the features we build into each ampoule.  We formulate the reagent in liquid form with buffers and anti-interference components and we measure the dosage for you.  We also measure the sample for you and then, after the test is done, we let you walk away without glassware to clean up.  All these features save you time, and that's money!  Compare the ordinary test kit procedures, with their slow-dissolving tablets or powdered reagents put up in "fumble packs," to the CHEMetrics way.  It will be clear that our self-filling ampoules mean savings.

What about safety?
Some reagents have hazardous properties - - that's unavoidable.  But when you use self-filling ampoules, contact and exposure are minimized because the reagent packaged in the ampoule remains in the ampoule, even after testing is finished.  That means that CHEMetrics' tests are safer to use than ordinary methods that require the analyst to handle and dispense potentially dangerous chemicals.  (N.B.  Caution is advised when performing any chemical operation.  Some self-filling ampoule tests require the use of accessory reagents which must be added directly to the sample.  Disposal of all chemical materials is subject to governmental regulation.)

Colorimetric test ampoules for visual and photometric readout.
The exact quantity of pre-formulated reagent needed for a single test is sealed under vacuum in the tapered tip ampoule.  The tip is scored for dependable fracture when you're ready to perform an analysis.  Simply snap the tip of the ampoule in the sample. It will fill instantly as sample flows into the tube and mixes with the color-forming reagent inside.  You can choose visual or instrumental methods to quantify your result.  The basic, snap-mix-read simplicity of the self-filling ampoule concept is available in four versions:  CHEMets^®, Vacu-vials^®, ULR CHEMets^® and TRACE Vacu-vials^®.

Auto-diluting ampoules for high range analysis.
VACUettes^® are CHEMetrics' answer to another of the analyst's headaches - - diluting samples so that they fall within the applicable range of a colorimetric method.  Each Vacuette ampoule is a CHEMet that's fitted with a pre-calibrated capillary pipette at the tip.  When high concentrations of analyte are to be measured, the capillary automatically captures the proper volume of sample.  The analyst then simply snaps the tip of the ampoule in dilution water to flush the contents of the capillary into the tube, diluting it at the same time.  Capillaries of various sizes are used to provide a variety of dilution ratios.  (See also VACUettes^®)

Titration tests with self-filling ampoules.
Titrets^® simplify titration tests just as CHEMets and Vacu-vials simplify colorimetric tests.  Each Titret contains a carefully measured quantity of titrant sealed under vacuum.  The sealed tip of the ampoule is fitted with a miniature valve that is used to control the flow of sample into the ampoule as the analyst performs what is known as a "reverse titration."  Sample is introduced into the ampoule in small increments (with mixing) while the analyst watches for the color change which signals the end-point of the titration.  When that change occurs, the ampoule is placed in an upright position and the test result is read opposite the location of the liquid level, using a scale printed on the side of the tube.  The entire process requires only a minute or two and avoids all the equipment hassle and clean-up associated with ordinary titrations.  (See also Titrets.)