Description

Shizhu rhizoma coptidis belongs to the rhizoma of Coptis chinensis Franch with Chinese name: "Jizhualian", "Weilian", it is a kind of rare TCM Material, originally listed as top grade herb in Shennong Bencaojing(a famous Chinese classic medicinal literature). Shizhu Rhizoma Coptidis enjoys its long planting history, biggest planting area, top output, and best quality. As early as in **2 A.D.(ie.Tianbao Yuannian,Tang Dynasty), Shizhu rhizoma coptidis was paid to the emperor as tribute. It is recorded that "Weilian is only cultivated, and solely produced in Shizhu County" in Medicinal Materials in Sichuan Province edited by Bank of China in ***4. In ***9,Shizhu Rhizoma Coptidis was confirmed as "Trueborn Chinese Goldthread" at the National Trueborn Medicinal Materials Academic Seminar held in Taian,Shandong Province. In ***1, the National Ministry of Agriculture invested in CSCC to establish the high quality Chinese goldthread base.

Quality Standards: Shizhu rhizoma coptidis product is divided into two types:row goldthread and individual stem goldthread, the quality standards as follow,

     1 Dry row goldthread: Dry & solid body, jaw shape, no fibrils on the surface, remaining stem on the top, internode few pure wood fiber segment; no char black, milden and rot, worm-eaten. Individual goldthread separated from the row goldthread: Individual stem, dry and solid, no fibrils, no pure wood fiber segment, length over 3cm, diameter over 0.3cm; no char black, milden & rot, and wormeaten.

     2 Physical And Chemical Index:Moisture/ (%)not more than*3.0; Ash Content/(%)not more than 5.0 ; Impurity/(%)not more than 1.0 ; C*0H*8ClNO4/(%): Dried row goldthread not less than 5.0, Individual goldthread separatedfrom the row product no less than 7.0

     3 Heavy Metal Content(mg/kg): Heavy metal content not more than *0.0, Hg not morethan 0.2, Lead not more than 5.0 , AS not more than 2.0