Application PMA 5: Quick Verification
Flash point values are influenced by the type of apparatus, its condition, the test method or how a test is carried out. Adding water to a solvent can raise the flash point value and therefore can be used for a quick check of the instrument performance.
The performance of the flash point testers should be verified on a regular basis using either a CRM (certified reference material) produced in accordance with ISO guide 34 and ISO guide 35 or an in-house reference material / SWS (secondary working standard).
Sometimes, there is no CRM or SWS available at the customer side to check the performance of the instrument.
An easy way of producing a material with a known flash point is adding water to a solvent, provided that the solvent is water-miscible.
Fig. 1: PMA 5
The table below shows flash points for different ethanol/water mixtures tested with a PMA 5 in accordance with the methods ISO 2719-A and ASTM D93-A:
|Ethanol Concentration in Water ||Approx. PMA 5 Flash Point |
(ISO 2719-A, ASTM D93-A)
|100 %||15 °C|
|90 %||20 °C|
|75 %||22 °C|
|50 %||25 °C|
|25 %||36 °C|
|10 %||51 °C|
|5 %||63 °C|
Tab. 1: Correlation of solvent concentration and flash point
Important to Know
Only the PMA 5 multi-detectors shown below are suitable to perform tests with water containing samples:
Fig. 2: Multi-detector with new stainless steel Pt100 and flash point detector design (164701)
Fig. 3: Multi-detector with glass Pt100 and new flash point detector design (164390)
Fig. 4: Flash point detector design: old ⇒ new
Do you have any questions?
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