L-谷氨酸 56-86-0 L-Glutamicacid 其一钠盐——谷氨酸钠用作调味品，商品有味精和味素等 Appearance:Whitecrystalsorcrystallinepowder//Specificrotation[α]20/D(C=10in2NHCl):+31.5to+32.4°//Stateofsolution(Transmittance):Clearandcolorlessnotlessthan98.0%//Chloride(Cl):Notmorethan0.020%//Ammonium(NH4):Notmorethan0.02%//Sulfate(SO4):Notmorethan0.020%//Iron(Fe):Notmorethan10ppm//Heavymetal(Pb):Notmorethan10ppm//Arsenic(As2O3):Notmorethan1ppm//OtherAminoAcidsChromatographically:Notdetectable//Lossondrying:Notmorethan0.20%//Residueonignition(sulfated):Notmorethan0.10%//Assay:99.0%to100.5%//pH:3.0to3.5