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- 详细信息
- 文献和实验
- 技术资料
- 保存条件:
2-8°C
- 保质期:
根据瓶身LOT号查询
- 英文名:
Ascorbic Acid
- 库存:
有现货
- 供应商:
浙江羽翔生物科技有限公司
- CAS号:
50-81-7
- 规格:
2G
属性
等级
certified reference material
pharmaceutical secondary standard
质量水平
300
Agency
traceable to Ph. Eur. A1300000
traceable to USP 1043003
API类
ascorbic acid
表单
solid
CofA
current certificate can be downloaded
技术
HPLC: suitable
gas chromatography (GC): suitable
mp
190-194 °C (dec.)
应用
food and beverages
包装形式
neat
储存温度
2-8°C
SMILES字符串
OC([C@]([C@@H](O)CO)([H])O1)=C(O)C1=O
InChI
1S/C6H8O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-10H,1H2/t2-,5+/m0/s1
InChI key
CIWBSHSKHKDKBQ-JLAZNSOCSA-N
一般描述
应用
生化/生理作用
分析说明
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文献和实验Ascorbic acid: a review of its chemistry and reactivity in relation to a wine environment.
Extensive reviews of research are available on the use of ascorbic acid, and its consequent degradation pathways, in physiological conditions or food matrices. However, very little information can be found for wine-related systems. This review highlights the relevant chemistry and reactivity of ascorbic acid with a focus on its behavior and potential behavior in a wine environment. The review describes the use of ascorbic acid as a complementary antioxidant preservative to sulfur dioxide along with the metal-catalyzed and radical-dependent manner by which it achieves this role. The relevant degradation products of ascorbic acid in aerobic and anaerobic conditions are presented as well as the interaction of these degradation products with sulfur dioxide and other wine-relevant sulfur compounds. Limitations in existing knowledge, especially regarding the crossover between the antioxidant and pro-oxidant roles of ascorbic acid, are identified.
氧化分解,干燥条件下较为稳定。故维生素C制剂应放在干燥、低温和避光处保存;在烹调蔬菜时,不宜烧煮过度并应避免接触碱和铜器。维生素C在体内能维持毛细血管正常渗透和结缔组织的正常代谢;调节脂肪代谢,促使胆固醇转化;有抗氧化作用,能保护不饱和脂肪酸,使之不被氧化成为过氧化物,因此维生素C还有保护细胞和抗衰老作用。人、猴和豚鼠不能合成维生素C,需从食物中摄取。成人每天需45~75毫克,儿童每天需40~50毫克。 维生素C有一定的治疗和保健作用。缺乏时,可能引起多种症状。最典型的维生素C缺乏症是坏血症,患者
licanming 请问大家用sigma公司的PMA时,储存液的浓度是配多少的?保存期多长?我是准备用DMSO配,我看说明书的意思是储存液浓度为20mM,但我工作液的浓度只要100nM,故很难分装和稀释。如果储存液浓度低一点,会不会对保存时间产生影响啊?我在园子里搜过,有用1mg/ml的,但我不知他是否用sigma公司的。 licanming 自己顶一下 amygdala 对于保存
Ampicillin (50mg/ml) Ampicillin Dissolve Ampicillin (Na salt from Sigma, A-9518) in H2 0. Store 1 ml aliquots at 20o C in common freezer for stock solutions 上一篇:PREPARATION
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