Amino-acids on Hands

Details Amino-acids on Hands Amino-acids on Hands

Jan 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965natur.205..284h&link_type=abstract

Nature, Volume 205, Issue 4968, pp. 284-285 (1965).

Physics

17

Scientific paper

RECENT methods for the determination of amino-acids by ion-exchange chromatography at the 10-8 and 10-9 mole levels1,2 are now able to give a quantitative measure of observations that have hitherto been of a qualitative nature3,4. For example, it is well known that finger-marks on paper chromatography are to be avoided because they are deeply coloured on treatment with ninhydrin reagent. It is probably less well appreciated that amino-acids might be introduced, some considerably in excess of the 10-8 mole level, at any or all steps of preparative manipulation prior to chromatography, and these contaminants would then be unwittingly measured along with the material of analytical interest.

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