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.

Reference Materials

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).

Quick Verification

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?

Contact Anton Paar ProveTec directly:support.provetec[at]anton-paar.com

Learn more about the PMA 5