计算溶液所需的质量、体积或浓度。
本试剂采用钨酸钠、钼酸钠、磷酸、浓盐酸按一定比例加热回流后加入硫酸锂精制而成,色泽金黄、 透亮,是实验室测定溶液中蛋白质、多肽、多酚或酪氨酸等物质含量的常用试剂。本品酸度为 1N,请根 据实验需要直接使用或适当稀释。本试剂可测定蛋白浓度 0.05~1mg/mL,当蛋白浓度范围为 0.05~ 0.5mg/mL 时,线性关系最好。如果待测样品蛋白浓度超过此范围,请适当稀释到合适浓度范围。本试剂 具有腐蚀性,应避免接触皮肤、粘膜等;试剂颜色变为墨绿色时应弃用。
组成:
福林酚试剂 500ml
实验前准备工作:
1、配制 A1:称取 20g 无水碳酸钠、4g 氢氧化钠溶解于 1L 水中;
2、配制 A2:称取 0.2g 硫酸铜溶于 20mL 水中;
3、配制 A3:称取 0.4g 酒石酸钾钠溶于 20mL 水中;在测定的当天将 A1:A2:A3 按100:1:1 的体积比混合,即为试剂 A,混合放置 30 分钟后使用。先将 A2 和 A3 混合,混合液再与A1 混合,次序颠倒可能有沉淀产生。试剂 A 只能当天使用,如产生沉淀或混浊需重新配制,三种溶液分开于室温下可长期保存。
4、先制作 2mg/mL 的蛋白母液,再参考“附表”稀释成各种浓度的蛋白标准品溶液。
操作步骤操作步骤(反应总体积 5.6mL):
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注:根据实际所需反应总体积,以上试剂用量可按比例缩放(蛋白样品:试剂A:福林酚试剂=1:50:5)。
注意事项:
1、 注意密封保存,避免挥发和腐蚀物品。
2、 为了您的安全和健康,请穿实验服并戴一次性手套操作。
有效期:6 个月有效。
使用说明:
参考文献:1.Chen LY, Cheng CW, Liang JY. Food Chem. 2015. 170:10-5.2.Ainsworth EA, Gillespie KM. Nat Protoc. 2007. 2(4):875-7.3.Lowry OH, Rosebrough NJ, Farr AL, Randall RJ. J Biol Chem. 1951. 193(1):265-75.
This reagent is made by heating and refluxing sodium tungstate, sodium molybdate, phosphoric acid, and concentrated hydrochloric acid in a certain proportion, and then refining them with lithium sulfate. It has a golden and transparent color and is a commonly used reagent for determining the content of proteins, peptides, polyphenols, tyrosine, and other substances in laboratory solutions. The acidity of this product is 1N. Please use it directly or dilute it appropriately according to experimental needs. This reagent can determine protein concentrations ranging from 0.05 to 1mg/mL. The linear relationship is best when the protein concentration is within the range of 0.05 to 0.5mg/mL. If the protein concentration of the test sample exceeds this range, please dilute it appropriately to the appropriate concentration range. This reagent is corrosive and should be avoided from contact with skin, mucous membranes, etc; When the color of the reagent turns dark green, it should be discarded.
Form:
Folin phenol reagent 500ml
Preparation before the experiment:
1. Preparation A1: Weigh 20g anhydrous sodium carbonate and 4g sodium hydroxide and dissolve them in 1L of water;
2. Preparation A2: Weigh 0.2g of copper sulfate and dissolve it in 20mL of water;
3. Preparation A3: Weigh 0.4g of potassium sodium tartrate and dissolve it in 20mL of water; On the day of measurement, mix A1: A2: A3 in a volume ratio of 100:1:1 to obtain reagent A. Mix and let it sit for 30 minutes before use. Mix A2 and A3 first, and then mix the mixture with A1. Reversing the order may result in precipitation. Reagent A can only be used on the same day. If precipitation or turbidity occurs, it needs to be re prepared. The three solutions can be stored separately at room temperature for a long time.
4. First, prepare a 2mg/mL protein mother liquor, and then dilute it into protein standard solutions of various concentrations according to the "Appendix".
Operation steps (total reaction volume 5.6mL):
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Note: The above reagent quantities can be scaled proportionally based on the actual required total reaction volume (protein sample: reagent A: Folin phenol reagent=1:50:5).
Matters needing attention:
1. Pay attention to sealed storage to avoid volatile and corrosive substances.
2. For your safety and health, please wear lab coats and disposable gloves when operating.
Validity period: 6 months.
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 | |
| 分析证书 | F743371 |