1. The sub-sample,
1.1 Divide the milk sample
1.1.1 Milk samples divided into eight sections, each weighing a number 1. XXXX g
split sample 1.1.2 sterilized milk Wright two samples into 6 parts because the experiment three times by weighing
each section, weighing a total of five. . XXXX gram
samples of milk powder and 1.2 parts by weight of an 8 1.1.1 addition of 30% hydrogen peroxide
2 ml and 8 ml of 65% nitric acid was put into a container for the sub-sample of the microwave -
Digest Version
1.3. Bring samples sterilized milk Wright 6, the scale of Clause 1.1.2 addition of 30% hydrogen peroxide and 1 mL of 65% nitric acid, 7 g sub sample is put into containers for microwave applications Digest.
1.4 Digest to microwave applications by programming in Table
1.5. Samples were taken from the small slope Microwave Digest. Removal carbonate compounds by the addition of 8 ml of 0.1 M sodium carbonate volume. For separating ions such as calcium, magnesium and iron carbonate ion compounds that
1.6. Filtering solution and adjust the pH in the range of 4.50 ± 0.05 by adding ammonia. (Add, drop by drop)
1.7. Example Formula 3 species, all eight part 4 of each brand is measured light intensity by means of spectroscopy fluorocarbon metric and 4 parts water to Spike Standard Addition
1.8 from milk Sterling Wright, either. 2 6 3 the share of each brand is measured light intensity by means of spectroscopy fluorocarbon matrix and 3 parts to make Spike Standard Addition.
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