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5+ Year Member
Aug 8, 2011
Can anyone tell me the right answer to this problem....

What techniques can be used to separate non-volatile substances?

Thin-layer Chromatography
Gas-liquid Chromatography
Steam Distillation

Also, is there an error in the biology section? This question ask what is the major intracellular buffer and the answer choices are: TRIS, Acetate, Phosphate, Bicarbonate, and Calcium Carbonate. I choose Phosphate and got it wrong. There is a similar question in the 2011 DAT Destroyer (#312) and the correct answer is phosphate and that's why I marked that answer in the 2009 ADA test but it marked it as wrong. I don't get it.
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