Application RapidOxy: Stability of Fragrance Oils
The stability of fragrance oils with different additives was tested at 140 °C in the RapidOxy and according to the EN 14112.
Alternative to Traditional Stability Test Methods
The rapid small scale tester, RapidOxy, is a fast, safe and user friendly alternative to traditional stability test methods. The instrument measures the induction period, which can be used as an indication of the oxidation and storage stability. Compared to other oxidation and storage stability test methods, the RapidOxy procedure requires only a small sample to give exact test results in a short period of time.
Quick Preparation and Easy Handling
All it takes on preparation is to fill 5 mL of the sample directly into the test chamber, tighten the screw cap and close the instrument. The test chamber is automatically charged with oxygen pressure and heated until it reaches the test temperature (e.g. 140 °C in a standard program). Now the pressure is monitored until a pressure drop of 10 % from pmax is detected.
Fig. 1: Display of test progress
Comparing Test Results of RapidOxy and EN 14112
The following table shows the oxidation stability of fragrance oil base and of fragrance oil with additives at test temperatures of 140 °C in the RapidOxy and at 110 °C for the EN 14112 by 20 l/h air.
|Time from start until pressure drop of |
10 % below pmax
|Mixture||1. Test||2. Test||EN 14112|
|Basic sample (pure)||25:60 min||24:88 min||4:96 h|
|+ 0.1 % Aperoxid TLA||58:23 min||58:25 min||20:47 h|
|+ 0.5 % Natrox RO5||64:78 min||65:91 min||28:97 h|
|+ 0.05 % BHT||98:70 min||97:85 min||11:56 h |
|+ 0.05 % Tinogard® TT||100:26 min||100:00 min||47:05 h|
According to the RapidOxy, the additives 0.05 % Tinogard® TT and 0.05 % BHT have the biggest influence on increasing the oxidation stability.
According to the EN 14112, the additive Tinogard® TT has the biggest influence on the oxidation stability.
We found a good repeatability for all samples.
Do you have any questions?
Contact Anton Paar ProveTec directly: support.provetec[at]anton-paar.com
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