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Glycol Test Kit

Visual Kit

Range MDL Method Type Kit Cat. No. Refill
1 - 15 ppm & 10 - 300 ppm EG
(up to 12,000 ppm w/dilution)
1 ppm Purpald-Periodate CHEMets K-4815 R-4815

CHEMetrics test kit K-4815 for the determination of Glycol in aqueous solutions employs the well-known Purpald reagent to deliver sensitivity and accuracy within minutes. This test requires much less time to perform and involves fewer manipulations than the standard chromotropic acid procedure. Based on CHEMetrics patented Self-Filling Reagent Ampoule technology. Premixed. Premeasured. Precise. Each kit contains 30 tests. CHEMets® visual test kits use colour comparators for analysis.

The Purpald®-Periodate Method

In the colourimetric chemistry, periodic acid oxidises ethylene glycol and/or propylene glycol to formaldehyde, which reacts with Purpald in alkaline solution. Test results are expressed as ppm (mg/l) ethylene glycol.

To convert results to ppm propylene glycol, multiply by 2.

Test kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, 1 -15 ppm Flat Comparator, Activator Solutions, 25ml sample cup, sample cup top, 3ml syringe and test instructions.

Shelf-life: five months. We recommend stocking quantities that will be used within four months.

Purpald® developed by Aldrich Chemical Company.
Fritz, James S. and Schenk, George H., Quantitative Analytical Chemistry, 4th ed., p. 277 (1979).

Technical Data Sheet


Using the Glycol test kit in conjunction with the included dilution syringe, the analyst is able to measure ethylene glycol in the range 10 to 300 ppm. If further dilutions are required, to extend the test range of the kit to 12,000 ppm, optional sample dilution accessories are available (right column below). See the test instructions for more information.

Included In Kit Optional Accessories
1 - 15 ppm (no dilution) 100 - 1,500 ppm (100×)
10 - 150 ppm (10×) 200 - 3,000 ppm (200×)
20 - 300 ppm (20×) 400 - 6,000 ppm (400×)
800 - 12,000 ppm (800×)


Glycols are used in water systems or cooling systems to keep temperatures low and prevent freezing. Ethylene glycol (EG) is the most common primary ingredient in commercially-available antifreezes and engine coolants. Propylene glycol (PG) is more commonly used in food or industrial refrigeration industries and HVAC systems. Glycols are also used as a component of corrosion inhibitors that protect metal surfaces in cooling water systems. Testing for glycol is commonly done in potable waters to ensure that there is no contamination from a cooling system. Glycol is often found in deicing chemicals that are used on aircraft and occasionally roads. In these cases, monitoring glycol is done to ensure that local bodies of water are not being contaminated by stormwater effluent. As glycol is a recyclable chemical, glycol testing is also performed by recycling operations to ensure purity and efficiency of the process.

What is Glycol?

Glycol is an organic compound that is a part of the alcohol family, specifically the diol group of compounds that contain two hydroxyl (-OH) groups. Aliphatic diols (with a straight carbon chain) are known as glycols. Glycols are generally non-irritating and with a very low volatility. Two of the most commonly used glycols are EG (C2H6O2 or HO-CH2-CH2-OH) and PG (C3H8O2 or CH3CH(OH)CH2OH). Both are miscible with water and a variety of solvents, and are toxic in high concentrations if ingested or inhaled. EG has a MP of -12.9°C and BP of 197.3°C. PG has a MP of -59°C and BP of 188.2°C. EG has superior heat transfer efficiency because of its lower viscosity, but will freeze at a higher temperature than PG.