D-Histidine CAS 351-50-8 HD-His-OH Assay 98.5 ~ 101.0% Factory

pH
Ɗauki 1.0g na wannan samfurin, ƙara 50ml na ruwa don narke, kuma auna shi bisa ga doka (General law 0631).Matsakaicin pH ya kamata ya zama 7.0 ~ 8.5.
Isar da Magani
Ɗauki 0.60g na wannan samfurin, ƙara ruwa 20ml don narke, bisa ga UV-bayyana spectrophotometry (General law 0401), auna watsawa a 430nm zangon, ba kasa da 98.0%.
Chloride
Ɗauki 0.25g na wannan samfurin kuma duba shi bisa ga doka (Gaba ɗaya doka 0801).Idan aka kwatanta da maganin kulawa da aka yi da 0.02% na daidaitaccen maganin sodium chloride, bai kamata ya kasance mai da hankali ba ().
Sulfate
Ɗauki 1.0g na wannan samfurin kuma duba shi bisa ga doka (Gaba ɗaya doka 0802).Idan aka kwatanta da maganin kulawa da aka yi da 0.02% na daidaitaccen bayani na potassium sulfate, bai kamata ya kasance mai da hankali ba ().
Ammonium gishiri
Ɗauki 0.10g na wannan samfurin kuma duba shi bisa ga doka (Gaba ɗaya doka 0808).Idan aka kwatanta da maganin kulawa da aka yi da 0.02% na daidaitaccen maganin ammonium chloride, ba zai zama mai zurfi ba ().
Sauran Amino Acids
Ɗauki adadin da ya dace na wannan samfurin, ƙara ruwa don narkar da kuma tsarma don yin bayani mai dauke da kimanin 10 MG da lml a matsayin maganin gwaji;Ɗauki 1ml don ma'auni daidai kuma saka shi a cikin gilashin ma'auni na 200ml, tsoma zuwa sikelin da ruwa, girgiza da kyau, a matsayin maganin sarrafawa;Ɗauki adadin da ya dace na bayanin histidine da proline bi da bi, kuma sanya a cikin ma'aunin ma'auni guda ɗaya, an ƙara ruwa don narkar da shi don shirya maganin da ke dauke da kimanin 0.4mg kowace 1ml a matsayin tsarin da ya dace.Dangane da gwajin chromatography na bakin ciki (General 0502), Zana 5 u1 na kowane mafita guda uku na sama, bi da bi a kan silica gel G bakin bakin ciki farantin, tare da N-propanol-mai da hankali ammonia bayani (67:33) kamar yadda haɓaka ƙarfi, faɗaɗa, bushe, fesa tare da ninhydrin a cikin maganin acetone (1-50), zafi a 80 ° C har sai tabo ya bayyana, kuma bincika nan da nan.Maganin sarrafawa ya kamata ya nuna tabo mai haske, kuma tsarin da ya dace ya kamata ya nuna tabo guda biyu gaba ɗaya.Idan maganin gwajin ya nuna alamun rashin tsabta, launi bai kamata ya kasance mai zurfi (0.5%) fiye da babban wurin maganin sarrafawa ba.
Asara akan bushewa
dauki wannan samfurin, bushe a 105 ℃ na 3 hours, asarar nauyi ba zai wuce 0.2% (General mulki 0831).
Ragowa akan Ignition
Ba fiye da 0.1% (Gaba ɗaya mulkin 0841).
Iron Gishiri
Ɗauki 1.0g na wannan samfurin kuma duba shi bisa ga doka (Gaba ɗaya doka 0807).Idan aka kwatanta da maganin kulawa da aka yi da 0.001% na daidaitaccen maganin ƙarfe, ba zai zama mai zurfi ba ().
Karfe masu nauyi
Wannan samfurin 1.0g, dubawa bisa ga doka (General Principles 0821 Doka ta farko), mai ɗauke da ƙarfe mai nauyi ba zai wuce sassa 10 a kowace miliyan ba.
Gishiri arsenic
Ɗauki 2.0g na wannan samfurin, ƙara 23ml na ruwa don narke, ƙara 5ml na hydrochloric acid, duba bisa ga doka (General law 0822 first law), ya dace da tanadi (0.0001%).
Bacterial Endotoxin
Ɗauki wannan samfurin, duba bisa ga doka (Gaba ɗaya doka 1143), kowane lg histidine mai dauke da endotoxin ya kamata ya zama ƙasa da 6.0EU.(Don allura)
351-50-8 - Ƙayyadaddun abun ciki
Ɗauki wannan samfurin game da 0.15g, ma'auni madaidaici, ƙara anhydrous formic acid 2ml don narkewa, ƙara glacial acetic acid 50ml, bisa ga yuwuwar titration hanya (General 0701), tare da perchloric acid titration bayani (0.1 mol/L) titration, da kuma An gyara sakamakon titration tare da gwaji mara kyau.Kowane 1 ml perchloric acid titration bayani (0.1 mol/L) yayi daidai da 15.52mg na C6H9N302.