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Application RapidOxy: Repeatability of Test Results

The repeatability of test results for sunflower oil was tested.

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.

 

Repeatability

The goal for this measurement was to test the repeatability of test results at 140 °C and 110 °C.

The sample was a commercially available sunflower oil (Kunella, best before date: 01/10/2016).

5 mL of the sunflower oil were directly filled into the RapidOxy and tested with the standard program B0-B100 at a test temperature of 140 °C and 700 kPa filling pressure and in a user-defined program at a test temperature of 110 °C and 700 kPa filling pressure until a pressure drop of 10 % below maximum pressure (pmax) occurred.

 

Accessories

107296 O-ring set, Viton®, pack of 100

107138 Cleaning tissues, 150 sheets

107137 Pipettes, 5 mL, pack of 100

 

Results I

Date of test Result at 140 °C
(minutes)
05.09.2016 21.55
06.09.2016 21.68
06.09.2016 21.65
06.09.2016 21.60
06.09.2016 21.61
06.09.2016 21.80
07.09.2016 21.56
07.09.2016 21.43
07.09.2016 21.51
07.09.2016 21.51
Maximum 21.80
Minimum 21.43
Max-Min 0.37

 

Results II

Date of test Result at 110 °C
(minutes)
08.09.2016 123.10
08.09.2016 122.90
08.09.2016 123.23
08.09.2016 123.06
09.09.2016 123.03
09.09.2016 123.11
14.09.2016 122.36
15.09.2016 121.91
15.09.2016 121.78
19.09.2016 120.88
Maximum 123.23
Minimum 120.88
Max-Min 2.35

Tab. 1: Results for sunflower oil in minutes

 

Discussion

The test results show a very good repeatability for both temperatures 110 °C and 140 °C.

 

Do you have any questions?

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

Learn more about the RapidOxy