Powdered Alisma Rhizome
Alismatis Rhizoma Pulveratum
Powdered Alisma Rhizome is the powder of Alisma Rhizome.
Description:
Powdered Alisma Rhizome occurs as a light grayish brown powder, and has a slight odor and a slightly bitter taste.
Under a microscope, Powdered Alisma Rhizome reveals mainly starch grains, fragments of parenchyma containing them, parenchyma cells containing yellow contents, and fragments of vascular bundles. Starch grains, spheroidal to ellipsoidal simple grains, 3.15 mm in diameter.
Purity:
(1) Heavy metals. Proceed with 1.0 g of Powdered Alisma Rhizome according to Method 3, and perform the test. Prepare the control solution with 2.0 mL of Standard Lead Solution (not more than 20 ppm).
(2) Arsenic. Prepare the test solution with 0.40 g of Powdered Alisma Rhizome according to Method 4, and perform the test (not more than 5 ppm).
Total ash:
Not more than 5.0z.
Acid-insoluble ash:
Not more than 0.5z.
Containers and storage:
Containers.Well-closed containers.
