木兰花碱 Chromium solution 质量规格:500mg/L,溶剂:水Melting Point:N/A 碘化木兰花碱 Chromium solution 质量规格:100µg/mL,基体:水Molecular Weight:362.85 去甲乌药碱盐酸盐(标准品) Cobalt standard 质量规格:500mg/L,溶剂:1%盐酸Melting Point:32 - 35°C 去甲乌药碱盐酸盐 Cobalt standard 质量规格:100(20℃)µg/mL,基体: 1%HNO3Applications:2-({[(1R)-1-phenylethyl]amino}methyl)-3,4-dihydroquinazolin-4-one (cas# 1406392-75-3) is a useful research chemical. 二氢欧山芹素 (标准品) Dysprosium standard 质量规格:1000μg/mlApplications:(3R,7aR)-3-Phenyltetrahydropyrrolo[1,2-C]oxazol-5(3H)-one (cas# 1820583-17-2) is a useful research chemical. 异泽兰黄素(标准品) Europium standard 质量规格:1000μg/mlMelting Point:N/A 利莫那班羧酸 Fluoride standard 质量规格:500mg/L,溶剂:水Applications:Phenol, 4-(5-bromo-2-pyridinyl)- (cas# 1032825-10-7) is a useful research chemical. 玉米黄质 Fluoride standard 质量规格:1000mg/L,基体:水Molecular Weight:215.27 三亚乙基硫代磷酰胺 Gold standard 质量规格:1000μg/mlCategory:Standards; Isotopic Labeled Analogues; Environmental Standards, Mutagens and Metabolites; 普拉克索碱 Germanium standard 质量规格:1000μg/mlMelting Point:N/A 普拉克索碱(标准品) Gadolinium standard 质量规格:1000μg/mlAppearance:White Solid 染料木素/金雀异黄酮 Gadolinium standard 质量规格:1000µg/mL,基体:10%HClMolecular Weight:728.1 染料木素/金雀异黄酮(标准品) Holmium solution 质量规格:1000μg/ml,溶剂:1.0Mol/L HNO3Category:Building Blocks; Isotopic Labeled Analogues; 木犀草素 Holmium solution 质量规格:1000µg/mL,基体:10%HCLApplications:Pantothenic Acid Cyclo Impurity is an impurity of Pantothenic Acid (P190300), a member of the B complex vitamins; essential vitamin for the biosynthesis of coenzyme A in mammalian cells. Occurs ubiquitously in all animal and plant tissue. The richest common source is liver, but jelly of the queen bee contains 6 times as much as liver. Rice bran and molasses are other good sources. 木犀草素(标准品) Iron resolution 质量规格:1000μg/ml,介质:1.0mol/L 硝酸Applications:Pantothenic Acid Cyclo Impurity is an impurity of Pantothenic Acid (P190300), a member of the B complex vitamins; essential vitamin for the biosynthesis of coenzyme A in mammalian cells. Occurs ubiquitously in all animal and plant tissue. The richest common source is liver, but jelly of the queen bee contains 6 times as much as liver. Rice bran and molasses are other good sources. 熊果酸 Iron solution 质量规格:1000mg/L,溶剂:5%盐酸Category:Standards; Pharmaceutical/API Drug Impurities/Metabolites; 1450-63-11,1,4,4-Tetraphenyl-1,3-butadiene甘草素 中文别名: 甘草醇 英文名: Liquiritigenin 英文别名: 4',7-Dihydroxyflavanone; 7,4'-Dihydroxyflavanone CAS登录号: 578-86-9 分子式: C15H12O4 分子量: 256.25 分子结构: 外观: 无色长针状结晶 规格: 20mg/支 纯度: ≥ 98% 用途: 用于含量测定/鉴定/药理实验等。 提取来源: 甘草。 熔点: 196℃ 药理药效: 解痉,抗溃疡,抗菌。可抑制单胺氧化酶,从而治疗抑郁性精神病。 贮存条件: 4℃冷藏、密封、避光 有效期: 2年 标准品或对照品的管理规范: 1.规范购入使用台账,严格表明购入时间、批号、来源、数量、使用期限等内容;申购的标准品或对照品的批号要与新颁布标准品或对照品批号相符; 2.严格按照规定条件进行储存,标准品或对照品的性状极不稳定,对储存条件和方式非常苛刻; 3.规范管理和使用: (1)严格按照1450-63-11,1,4,4-Tetraphenyl-1,3-butadiene说明书要求,由于标准品或对照品的不稳定性,若不安产品说明书的要求操作,极易造成较大的误差,从而影响检测结果; (2)称量精密准确,标准品和对照品的含量测定要求不同,对精密性的要求很高; (3)对于长期贮存的制备品,应充分考虑各方面的影响因素,规范操作; (4)同时配制两份对照溶液以控制检验误差,由于现在药品的标准含量测定方法较多采用对照比较法,在测定过程中,仅配制一份对照溶液容易造成因配制对照溶液过程出现偏差; (5)自行标定的标准品或对照品,严格规范操作,保证标准的可靠传递,并保证其可溯源性和准确性。