小中大
The suffix "R" in the name of Coomassie Brilliant Blue R-250 is an abbreviation for Red as the blue colour of the dye has a slight reddish tint. For the "G" variant the blue colour has a more greenish tint.(from wikipedia)
The colour of the two dyes depends on the acidity of the solution. The "G" form of the dye has been studied in detail.At a pH of less than 0 the dye has a red colour with an absorption maximum at a wavelength of 470 nm. At a pH of around 1 the dye is green with an absorption maximum at 620 nm while above pH 2 the dye is bright blue with a maximum at 595 nm.
If you have more knowledge of the Coomassie Brilliant Blue G-250,you will assure that you have got the right color.8D
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小弟要用考马斯亮蓝G250溶液测蛋白质含量,但是在配制考马斯亮蓝溶液这里出了问题
我是按照主流的方法配的,95%酒精+100mg考G250+100ML 85%磷酸,定容到1000ml
小弟在配制的时候,考马斯亮蓝先溶于酒精是蓝色,但在加入磷酸后,就变成棕红色
最后在定容的时候水还只加到一半,又变成蓝色了
正确的应该是棕红色吧?
各位有经验的大侠指教下,用此法配制考马斯亮蓝G250染色液的时候,每一步的颜色变化是什么样的?第一步溶于酒精,变成蓝色正常吗?
我的容器都反复冲洗过了呀,而且定容的水也是超纯水