Determination of DOBI & Carotene content in Palm Oil
The deterioration of bleach ability index, or DOBI, is an analytical procedure intended for quality control of crude palm oil. The test attempts to predict the ease of refining of crude palm oil and indicates its oxidative status. Fruit quality is one of the most important factors affecting DOBI values, together with ripeness and storage conditions. Carotene content is also an important quality control parameter for crude palm oil.
Method
Sample treatment
Solid samples at room temperature must be melted before being analysed. The sample must be collected when the oil is consistently melted and still warm.
Principle of the test
The deterioration of bleach ability index is the numerical ratio of the spectrophotometric absorbance at 446 nm to absorbance at 269 nm. The Carotene content is expressed as ppm of beta-carotene and it is calculated with an appropriate mathematical correlation with absorbance at 446 nm.
Calibration curve
CDR PalmOilTester shows a very good correlation with MPOB Test Methods p2.6 and p2.9.
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Reagent test Kits
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| DOBI & Carotene | 0.1 - 1500 ppm β-Carotene | 0.1 ppm β-Carotene | 10.7 ppm β-Carotene |
| DOBI & Carotene | 0.1 - 20 | 0.01 | 0.05 |
The analyzer for palm oils quality control
CDR PalmOilTester
Complete analysis panel, supplied already configured
Up to 16 determinations simultaneously
Possibility of carrying out analyses of the same sample
Integrated printer
Full connections (LAN - USB - Bluetooth barcode/QR code reader)