(1) Take this product and observe it under the microscope: there are many bast fibers in bundles, the diameter is 16 ~ 42 microns, and the wall thickness is not lignified or lignified; There are many lignified parenchyma cells, which are square, round, irregular or thin rectangular, with a diameter of 17 ~ 72 um. The walls are slightly thickened and lignified, with the most round single pits and the most obvious holes and grooves.

(2) Take 3 tablets of this product, grind them, add 5ml of petroleum ether, soak them for 65,438+0 hours, take 65,438+0 ml of leaching solution, evaporate, add a small amount of chloroform to dissolve the residue, and add 65,438+0 drops of 5% vanillin sulfuric acid solution, which turns yellow brown at first, red and reddish brown quickly, and finally purple.

(3) Take 3 tablets of this product, grind them, add 5ml of ether acidified by glacial acetic acid for impregnation, take 3ml of leaching solution, and after natural evaporation, add methanol 1ml to dissolve the residue. Divide the solution into two test tubes, and add a small amount of ammonium molybdate solid and 1 drop of sulfuric acid into one test tube, which turns brown first and then purple; The other tube is added with ferric chloride test solution, which is grayish brown.

(4) Take the residue soaked in ether under the discrimination item (3), add 5ml of ethanol and soak for 65438 0 hours, take 0.5ml of leaching solution, add a little magnesium powder and a few drops of hydrochloric acid, and after the bubbles disappear, the solution will be cherry red, and the color will be more obvious when heated and boiled. "Inspection" shall comply with the relevant regulations under tablets (appendix 1 1 page).