优质色氨酸

JIZHOU CITY HUAYANG CHEMICAL CO., LTD. Add:NO.645 FuYang East Road, Jizhou City, Hebeiprovince, China Phone: +86-318-8638826Fax:+86-318-8638826 CERTIFICATE OF ANALYSIS [table][tr][td] Product Name: L-Tryptophan[/td][td] Quantity: 1000kg[/td][td] Batch No: 1009000701[/td][/tr][tr][td] Producing date: 2010.07.01[/td][td] Sampling date: 2010.07.01[/td][td] Shelf life: two years[/td][/tr][tr][td] Reference standard：usp24[/td][/tr][tr][td] Item[/td][td] Specifications[/td][td] Test Results[/td][/tr][tr][td] Appearance[/td][td] White crystals or crystalline powder[/td][td] Conforms[/td][/tr][tr][td] Identification[/td][td] Positive [/td][td] Conforms[/td][/tr][tr][td] Assay,%[/td][td] 98.5～101.5[/td][td] 99.6[/td][/tr][tr][td] Specific optical rotation[/td][td] -29.4º～-32.8º[/td][td] -30.5º[/td][/tr][tr][td] PH[/td][td] 5.5-7.0[/td][td] 5.7[/td][/tr][tr][td] Loss on drying,%[/td][td] ≤0.3[/td][td] 0.17[/td][/tr][tr][td] Chloride(Cl),%[/td][td] ≤0.05[/td][td] ＜0.05[/td][/tr][tr][td] Sulfate(SO4),%[/td][td] ≤0.03[/td][td] ＜0.03[/td][/tr][tr][td] Iron(Fe) ,%[/td][td] ≤0.003[/td][td] ＜0.003[/td][/tr][tr][td] Heavy metals(Pb),%[/td][td] ≤0.0015[/td][td]