Estradiol Immunoaffinity HPLC Column
The Estradiol Immunoaffinity HPLC Column is For Research Use Only
Size: 3ml, 10 columns
Assay Principle
Many methods of Estrogens determination based on HPLC-UV detection show low selectivity if problematic matrices are applied. This method of content determination of Estrogens combines the high selectivity of immunoaffinity columns with its high potential to concentrate elute and of purification by HPLC column. The following instruction gives an optimized protocol for enrichment of very low contents in the pg/g range. In this case a mass detector might be best suited.
Please notice, that this instruction focuses on the handling with the IAC column. The given apparatus and detection (e.g. HPLC-FLD system) might serve as example among other possibilities.
Sample Preparation:
Sewage and drinking water samples are collected as described by Quintana et al1. Raw samples may be filtered through a 0.45μm pore size cellulose filter. Example: 1000g sewage effluent sample (equals approximately 1L) firstly are filtered like mentioned before and then added to the filtrate 10ml Buffer Solution (see under Buffer and Chemicals) to maintain pH neutrality. Thus, the final sample contains 1% (v/v) Buffer Solution.
Related Products
Folic Acid Immunoaffinity Column
Fumonisin Immunoaffinity Column
Biotin Immunoaffinity Column
Product Developed and Manufactured in Germany by BioTeZ Berlin-Buch GmbH
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精确称量与天平合规性管理—张忠任2017.8.2
精确称量与天平合规性管理—张忠任2017.8.2.pdf(5364.43k)
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(2) 向盘中加减砝码时要用镊子,不能用手接触砝码,不能把砝码弄湿、弄脏;(否则,砝码会沾上污物或被手上的汗水等锈蚀砝码,造成称量结果不精确)
(3) 潮湿的物体和化学物品不能直接放到天平盘中;(否则,会腐蚀天平托盘,减少天平使用寿命)
另外,还应注意:
(4) 搬动天平时,应轻拿轻放,不可让天平受到强烈振动;(否则,会损伤天平,造成天平的称量的灵敏度和精确度降低或减少天平的使用寿命)
(5) 用毕,应将游码归零,砝码归盒;横梁用固定圈固定,保证支架刀口不受损伤(此条适用于学生天平);(否则,会损伤天平,造成天平的称量的灵敏度和精确度降低或减少天平的使用寿命。)
那位大侠有相关资料?其中原理是什么?那个最小称样量是如何得来的?
我们公司是生物制药公司,最近购买了一台百万分之一天平,还未校正,想请教各位大牛,百万分之一天平如何校正,是否必须由计量局校正?制药行业有没有相关法规文件规定必须得校正?如果有,麻烦分享一下,谢谢!
1251分析天平称重提到:电子分析天平有基于所用负载的内部校准系统。此校准适用于当前的环境温度。
<41>砝码与天平里面提到:2级砝码用于内置砝码的分析天平的校准工作,以及用于日常分析工作的实验室砝码。
但是看到一份培训资料,说美国fda不认可电子天平的自校系统的校验。
希望了解的战友执教,天平的自校和外置砝码校验是否都被fda接受。
谢谢
亲:希望我的回答能够帮助到你,如果满意,请采纳或点赞支持,给我更多助人的动力!
我们公司想组建一个新的实验平台,仪器设备都得我们自己选,请问哪位有好点的分析天平(万一之一)推荐的,谢谢了。
我在预习天平的使用,这里不懂,谢谢
我公司新购进的一台梅特勒XUS205U的十万分之一天平,他可以进行十万分之一与万分之一的转换,d值0.01mg/0.1mg跟随工程师做了四角偏差,重复性的测试,关于最小称样量工程师拒绝给做。想请教各位有没有知道怎么做的。目前了解的就是用1g的砝码做标准偏差然后反推,但是还不是很清楚怎么做

