[閒聊] 各位的10X PBS或10X TBS放冰箱會沉澱嗎?
我發現我的10X PBS或10xTBS放4度冰箱,有時會有結晶沉澱,
(為啥放冰箱?因為外面架子不夠,加上有時擺太久會長黴)
不過根據
http://tinyurl.com/kkatdc6
PBS或TBS中最多量的NaCl其實都還在溶解度範圍內,
10X PBS的NaCl 大概1.37M=80g/L,10XTBS雖然配方有從1.5M到5M,但是
5M=280g/L,就算考慮體積變大還是比極限溶解度小,這樣放冰箱應該不會析出,
不過偶爾就是會有結晶沉澱,而且還不是每次都會(更奇怪)。
請問各位的PBS或TBS 10X stock放冰箱會沉澱嗎?
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起初,他們追殺共產主義者,我沒有說話,因為我不是共產主義者;
接著,他們追殺猶太人,我沒有說話,因為我不是猶太人;
後來,他們追殺工會成員,我沒有說話,因為我不是工會成員;
此後,他們追殺天主教徒,我沒有說話,因為我是新教教徒;
最後,他們奔我而來,卻再也沒有人站起來為我說話了。
《First They Came(他們首次來時)》,Martin Niemoller牧師(1892-1984)
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