Formaldehyde Test Kits
|Range||MDL||Method||Type||Kit Cat. No.||Refill Cat. No.|
|0.0 - 1.0 & 1 - 10 ppm||0.1 ppm||Purpald||CHEMets||K-4605||R-4605|
|0 - 30 & 30 - 300 ppm||5 ppm||Purpald||VACUettes||K-4605D||R-4605D|
|0 - 60 & 60 - 600 ppm||10 ppm||Purpald||VACUettes||K-4605A||R-4605A|
|0 - 120 & 120 - 1,200 ppm||20 ppm||Purpald||VACUettes||K-4605B||R-4605B|
|0 - 1,200 & 1,200 - 12,000 ppm||200 ppm||Purpald||VACUettes||K-4605C||R-4605C|
CHEMetrics offers test kits employing the well-known Purpald® reagent to deliver sensitivity and accuracy within two minutes or less. Based on CHEMetrics patented Self-Filling Reagent Ampoule technology. Premixed. Premeasured. Precise. Each kit contains 30 tests.
The Purpald Method
Purpald® is subject to fewer interferences than Schiff's reagent or chromotropic acid procedures. A purple-colored complex is formed when Purpald in alkaline solution reacts with formaldehyde. Results are expressed as ppm (mg/l) CH2O.
Shelf-life of the Purpald Reagent: five months. We recommend stocking quantities that will be used within four months.
Purpald® developed by Aldrich Chemical Co.
Formaldehyde, a toxic substance, is used in the following applications: metal plating baths, textile treatments, biological specimen preservatives, and disinfectants of medical equipment. Commercial formaldehyde gas is readily soluble in water.