Determination of DOBI & Carotene content in Palm Oil
The deterioration of bleachability 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.
|Analyses||Free Fatty Acids (FFA)
p-Anisidine Value (AnV)
DOBI & Carotene
|Simultaneous Sample Analyses||16|
|Multiple Analyses on a Sample|
Test type: End point
Testing time: one test 6 minute
Are possible test sessions with several samples, up to a maximum of 16.
The system is supplied pre-calibrated and ready for use.
Calibration Curve / Correlation Data
CDR PalmOilTester shows a very good correlation with MPOB Test Methods p2.6 and p2.9.
Principle of the test
The deterioration of bleachability index (DOBI) 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.
Reagent test Kits
The reagents are packaged in 4 bottles of 25 mL + 100 empty cuvettes and 100 caps
Code *300195 suitable for 100 tests
The reagents have a shelf-life of 12 months.
Sample Handling and Usage of Curves
Crude or refined palm oil, and palm kernel oil. Solid samples at room temperature must just be heated
|Parameter||Code||Meas. range||Sample Volume||Resolution||Repeatability|
|DOBI||*300195||0.1 – 20||10 μL of melted oil||0.01||0.1|
|Carotene content||*300195||0.1 – 1500 ppm||10 μL of melted oil||0.1 ppm||5 ppm|