L-亮氨酸(L-Leucine)

JIZHOU CITY HUAYANG CHEMICAL CO., LTD. Add:NO.645 FuYang East Road, Jizhou City, Hebeiprovince, China Phone: +86-318-8638826 Fax:+86-318-8638826 CERTIFICATE OF ANALYSIS [table][tr][td] Product Name: L-Leucine[/td][td] Quantity: 1000kg[/td][td] Batch No: 1008970930 [/td][td] [/td][/tr][tr][td] Producing date: 2010.09.30[/td][td] Sampling date: 2010.09.30[/td][td] Shelf life: two years[/td][td] [/td][/tr][tr][td] Reference standard: sup31[/td][/tr][tr][td] Item[/td][td] Specifications[/td][td] Results[/td][td] [/td][/tr][tr][td] Description[/td][td] White crystals or crystalline powder[/td][td] conforms[/td][td] [/td][/tr][tr][td] Identification (IR)[/td][td] Concordant with he reference spectrum[/td][td] Conforms[/td][td] [/td][/tr][tr][td] Specific rotation[/td][td] +14.9º~+17.3º[/td][td] +15.53º[/td][td] [/td][/tr][tr][td] Assay ,% [/td][td] 98.5~101.5[/td][td] 99.5[/td][td] [/td][/tr][tr][td] pH value[/td][td] 5.5～7.0[/td][td] 6.1[/td][td] [/td][/tr][tr][td] Loss on drying,% [/td][td] ≤0.20[/td][td] 0.12[/td][td] [/td][/tr][tr][td] Heavy metals , [/td][td] ≤15ppm[/td][td] ＜15ppm[/td][td] [/td][/tr][tr][td] Residue on ignition,% [/td][td] ≤0.40[/td][td] 0.02[/td][td] [/td][/tr][tr][td] Chloride (as Cl ) ,% [/td][td] ≤0.05[/td][td] ＜0.05[/td][td] [/td][/tr][tr][td] Sulfate (as SO4), % [/td][td] ≤0.03[/td][td] ＜0.03[/td][td] [/td][/tr][tr][td] Chromatographic purity[/td][td] Conforms[/td][td] Conforms[/td][td] [/td][/tr][tr][td] Iron (as Fe),[/td][td] ≤30ppm[/td][td] ＜30ppm[/td][td] [/td][/tr][tr][td] Organic volatile purity[/td][td] [/td][/tr][/table]Meets the requirements[td] Conforms[/td][td] [/td][tr][td] Conclusion: This product conforms to usp31 standard.[/td][td] [/td][/tr] Operator: Jia Jingtan Checker: Liu Qingshuang