1 Scope This standard is applicable to the determination of moisture content in compound feeds and single feeds, except for dairy products, animal and vegetable oils and minerals used as feed.
2 Principle The sample is dried in a 10 ± 20 ° oven at atmospheric pressure until constant weight, and the lost weight is moisture.
3 instruments
3.1 Laboratory sample mill or mortar.
3.2 Separation sieve: The pore size is 0.45mm (40 mesh).
3.3 Analytical balance: Sensitivity O.0001g.
3.4 Electric constant temperature oven: controllable temperature is 105120Co
3.5 Sample sample: glass or aluminum, diameter 40m or more, height 25m or less.
3.6 Dryer: Use a grasping calcium (dry reagent) or color changing silica gel as a desiccant.
'Selection and preparation of samples
4.1 Select a representative sample, the original sample should be above 10008.
4.2 Use the quadruple method to reduce the original sample to 500g, crush it to 40 mesh after the wind, and then use the quartering method to reduce it to 2008. Pack it in a sealed container and store it in a cool and dry place.
4.3 If the sample is a juicy fresh sample, or can not be pulverized, it should be dried beforehand, and the sample is weighed 200-300g, baked in 105, C oven for 15min, immediately reduced to 65 0C, dried for 5-6h. . After taking out, it was cooled in indoor air for 4 hours, and weighed, and the sample was air-dried.
5 Determination steps Clean the sample dish, bake in a 105 士 2'C oven for 1 h, remove, cool in a desiccator for 30 min, weigh to 0.00029, and then dry
After 30 min, it was cooled and weighed until the difference between the two weights was less than 0.00058 as constant weight.
Two parallel samples were weighed in a constant weight sample, each of which had a water content of 2-.58 or more and a sample thickness of 4 mm or less. accurate
r}0 .0002g, without cover the ffd cover, bake in the 105120C oven for 3h (starting at 105°C with temperature), take out, cover the sample Im
The lid was cooled in a desiccator for 30 min and weighed.
Then dry the same th, cool, weigh until the weight difference between the two weighing is less than 0.002g.
Raw materials of Love Goji powder are selected from "Ning Qi NO.1"Goji berries, which are planted on the standardized cultivation base in Zhongning County, Ningxia Hui Autonomous Region.
Love Goji powder has reached the international food hygiene standard, without any preservatives and additives. The powder is widely used in the production of functional food, beverage, healthy products, which is also used as important raw material of beauty products.
The powder has the advantages of low water content, good color, plump appearance and high commodity value, and processing of which is used the most ideal technique for drying Goji berries that is cacuum-spray dryness, which promises lower loss of bioactive substances.
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NINGXIA LOVE GOJI SUPPLY CHAIN CORPORATION , http://www.gojiscm.com