Talk:TBE buffer

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calculation

Who made the old calculation? It was quite wrong. Now corrected. --134.100.206.196 (talk) 14:32, 21 April 2008 (UTC)[reply]

No, the previous one was correct. The molar weight of disodium EDTA is 372.24 g, so 0.02 M = 7.44 g. KarlM (talk) 12:11, 21 July 2008 (UTC)[reply]

I don't agree. M for disodium EDTA is 292 + 2 * 23 - 2 = 336 (as dihydrate 372), for tetrasodium EDTA 292 + 4 * 23 - 4 = 380 (as tetrahydrate 452) and for CAS# 60-00-4 H4EDTA (as acid without Na+) 292,24 g/mol. So 20 mM = 5,8448 g. Volker —Preceding unsigned comment added by 84.144.95.29 (talk) 00:31, 21 October 2008 (UTC)[reply]