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MOA of Polygonum multiflorum Extract Powder Description: Brown Yellow, by visual observation.

Bulk Density: 0.4-0.6g/ml

Into a dry 10-mL cylinder introduce (m2), without compacting, approximately 4 g of test sample, M, weighed with 0.1% accuracy. Carefully level the powder without compacting, if necessary, and read the unsettled apparent volume (V), to the nearest graduated unit. And get the total weight (m1) with 0.1% accurately.

Bulk density =m1-m2/V

Particle Size: 100% pass 80 mesh

Weigh accurately about 10 g of the substance being examined and place on an 80 mesh sieve, cover the lid on top of the sieve, and fit tightly an appropriate receiving pan. Carry out the single screening test, shake the sieve in a rotary horizontal direction for not less than 3 minutes, and gently tap on the sieve frequently in vertical direction. Weigh accurately the amount in the receiving pan, and calculate the percentage.

Loss on drying: ≤5.0%

Place about 1g of the substance being examined in a tarred, shallow weighing bottle, previously dried to constant weight, then dry at 105 till constant weight. Calculate LOD.

Test as per Draco method 1.1.1.0

Acid insoluble Ash: ≤5.0%

Test as per Draco method 1.1.1.0.

Heavy metals (Total):≤10ppm

Unless otherwise specified, use two 25ml Nessler cylinders. To cylinder A add the specified volume of lead standard solution and 2 ml of acetate BS (Ph 3.5), dilute with water or other solvent as specified under individual monographs to 25 ml. To cylinder B add 25 ml of the test preparation containing a quantity of the substance being examined as specified under individual monographs.

If the original test preparation is coloured, it may be matched by the addition of a few drops of dilute caramel solution or other suitable solution to cylinder A.

To each cylinder add 2 ml of thioacetamide TS and mix well, allow to stand for 2 minutes, compare the colour produced by viewing down the vertical axis if the cylinder against a white background. The colour produced in cylinder B is not more intense than that produced in cylinder A.

If the colour cannot be matched by the addition of caramel solution, dissolve the double amount of the substance being examined and the reagent, in water or other solvent as specified under individual monographs to produce 30 ml of test preparation. Divide the test preparation into two equal portions and transfer to Nessler cylinders A and B. To cylinder B add sufficient water or other solvent as specified under individual monographs to produce 25 ml. To cylinder A add 2 ml of thioacetamide TS, mix well and allow to stand for 2 minutes, filter through filter membrane of 3 μm in porosity. To cylinder A add the prescribed volume of lead standard solution and dilute with water of other solvent as specified under individual monographs to produce 25 ml, Then add 2 ml of thioacetamide TS to cylinder B and 2 ml of water to cylinder A and compare the colour as described above.

In the substance being examined contains a ferric salt which interfers with the test, 0.5-1.0g of ascorbic acid should be added to each cylinder.

Unless otherwise specified, evaporae the same quantity of the same reagents to dryness in porcelain dish. Dissolve the residue in 2ml of acetate buffer (PH3.5) and 15 ml of water .Transfer the solution to a Nessler cylinder, add the specified quantity of lead standard solution and water to 25 ml. The solution is used as reference solution for the test solution which is prepared by using more than 1.0 ml of hydrochloric acid or equivalent amount of dilute hydrochloric acid, 2 ml of ammonia TS or by treating with other reagents.

Lead (Pb): ≤2.0ppm

ICP-OES (CQ-MO-247)

Arsenic (As): 2.0≤ppm

ICP-OES (CQ-MO-247)

Residual Pesticide: Non-detected

USP < 561 >

Microbial: Test as per FDA-BAM

Total microbacterial count: NMT1000cfu/g

Total Yeast & Mold: NMT100cfu/g

Salmonella: Negative

E.Coli: Negative

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