Page 82 - Analytical method for food addtives
P. 82
Analytical methods for food additives
46
Reference
Method conditions
M H 2 SO 4 and MgSO 4 . 15 Make to volume. Pipette aliquot into test tube, mL K 2 Cr 2 O 7 M H 2 SO 4 + 1.0 mL 0.15 add 1.0 and heat in boiling water bath for 5 min. Cool. Add thiobarbituric acid soln. Replace on boiling water bath for 10 min. Cool. Determine A at nm against blank 532 16 mL filtrate to separator
Sample preparation Steam distil sample with 1 Collect distillate in volumetric flask Blend with HPO 3 soln for 1 min. Filter through Whatman No. 3 paper acid solution mL wine diluted to 25 1.0 injected into FI system
Matrix Cheese Dairy products Raw beef Wines
Table 6.1 cont’d (c) Method Oxidation Spectro- photometric Colorimetric Spectro- photometric flow-injection
