Description: Determination of moisture content as measured by sample weight loss in an oven under specified conditions.
Materials: laboratory mill with 18-20 mesh screen; oven capable of maintaining 130F +/- 1F; aluminum moisture dishes 55mm dia and 15mm height; airtight desiccator with activated alumina; analytical balance with mg resolution;
Dependent_on:
Protocol:
1. Grind 30-40g of sample in the mill.
2. Mix rapidly with a spoon or spatula and immediately transfer a 2-3g portion to each of two or more tared moisture dishes.
3. Cover and weigh dishes at once.
4. Subtract the tare weights and record weight of sample.
5. Clean mill in between samples.
6. Uncover dishes and place them on shelf of oven. Place covers under the dished.
7. Insert shelf in oven at level of thermometer bulb.
8. Heat for exactly 60 min after the oven recovers its temperature.
9. Remove the shelf and dishes from the over, cover rapidly (using rubber finger insulators) and transfer to desiccator as quickly as possible.
10. Weigh dishes after they reach room temperature (45-60 min usually).
11. Determine loss in weight as moisture.
12. Replicate determinations must be within 0.2% moisture.
13. See AACC 44-15.02
Description: Determination of moisture content as measured by sample weight loss in an oven under specified conditions.
Materials: laboratory mill with 18-20 mesh screen; oven capable of maintaining 130F +/- 1F; aluminum moisture dishes 55mm dia and 15mm height; airtight desiccator with activated alumina; analytical balance with mg resolution;
Dependent_on:
Protocol:
1. Grind 30-40g of sample in the mill.
2. Mix rapidly with a spoon or spatula and immediately transfer a 2-3g portion to each of two or more tared moisture dishes.
3. Cover and weigh dishes at once.
4. Subtract the tare weights and record weight of sample.
5. Clean mill in between samples.
6. Uncover dishes and place them on shelf of oven. Place covers under the dished.
7. Insert shelf in oven at level of thermometer bulb.
8. Heat for exactly 60 min after the oven recovers its temperature.
9. Remove the shelf and dishes from the over, cover rapidly (using rubber finger insulators) and transfer to desiccator as quickly as possible.
10. Weigh dishes after they reach room temperature (45-60 min usually).
11. Determine loss in weight as moisture.
12. Replicate determinations must be within 0.2% moisture.
13. See AACC 44-15.02
