山药质量标准英文版
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Rhizoma Dioscoreae Oppositae
（山药，Shanyao）
Common Yanm Rhizome
DescriptionSubcylindrical, curved orsomewhatflattened, 15-30cmlong,
1.5-3cmdiameter,externallysmooth,whiteoryellowish-white.
Identification
(1)Powder:
(2)Heatunderreflux5gofthepowderin30mlofdichloromethanefor2hours,filter,evapora tethefiltratetodryness,dissolvetheresiduein1mlofdichloromethane as the test solution. Heatunderreflux 5g of the dioscin
30mlofdichloromethanefor2hours,filter,evaporatethefiltratetodryness,dissolvetheres idue in 1ml of dichloromethane as the reference solution. Carry out the method forthin layer chromatography(Appendix VI B), using silica gel Gasthecoatingsubstance andmixture of acetidin,methanol and srong ammonia solution (9:1:
CheckingWater contentNot more than
16.0% (AppendixIXH,method 1)Total ashNot more than
4.0%(AppendixIXK)
ExtractivesCarryoutthemethodfordeterminationofwatersolubleextractive(Appen dixXA, themerceration), not less than
7.0%.
Decocting pieces
ProcessingRhizomaDioscoreaeOppositaeEliminateforeignmatter,gradeaccording tosize, soak and soften thoroughly, cutinto thick slices,and dry. Subroundthick slices,
Externally whitish or pale yellowish-white, Texture fragile, easily broken,fracture whitish and starchy.
CheckingTotal ashNot more
2.0%.
ExtrativesNot more than
4.0%
The method ofIdentification、Checking(water content) is same like the method ofRhizoma Dioscoreae Oppositae.
RhizomaDioscoreaeOppositae(stir-bakedwithbran)Stir-baketheslivesofRhizomaDioscoreaeOppositaeasdescribedunderthemethodforstir-bakingwithbran(AppendixⅡD) to yellow.
Looklikedecoctingpieces,externallyyellowish-
whiteorslightlyyellow,withoccasional focal spot, odour, scorched.
CheckingWater contentNot more than
12.0%
ExtrativesNot less than
4.0%
The method ofIdentification、Checking(water content) is same like the method ofRhizoma Dioscoreae Oppositae.
ActionandicationsToreplenishthespleenandstomach,promotefluidsecretionandb enefitthelung,andstrengthenthekidneyandrestrainseminaldischarge.Anorexiaandchro nicdiarrheaduediminishedfunctionofthespleen;coughanddyspneaduetodiminishedfun ctionofthelung;seminalemission,excessiveleucorrhea,frequency ofurination or diabetes dueto deficiency of kidney.RhizomaDioscoreaeOppositae(stir-bakedwithbran)Diminishedfunctionofthespleen with anorexia, diarrhea and excessive leucorrhea.
Usage and dosage15-30g
StoragePreserve in a ventilated and dry place, protected from moth.