Effects of ultrasonic cleaning on the amino acid geochemistry of foraminifera tests

Details Effects of ultrasonic cleaning on the amino acid geochemistry of foraminifera tests Effects of ultrasonic cleaning on the amino acid geochemistry of foraminifera tests

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1567k&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Issue 9, pp.1567-1570

Physics

Scientific paper

Although investigations into amino acid geochemistry of foraminifera have included the use of ultrasonic cleaners as part of their cleaning procedure, there apparently has been no attempt to determine what effects this procedure may have on the observed chemical changes. This paper presents the results of a time study showing the effects of cleaning on ten protein amino acids and the non-protein alloisoleucine. The data suggest that there are three loosely defined groups which all ultimately undergo an exponential decrease in concentration, but which vary within the initial 45 min of treatment: Group I, stable; Group II, constantly decreasing; Group III, showing slight increases. The observed effects suggest that studies based on amino acid enantiomeric ratios probably are the least affected by procedural errors introduced by ultrasonification.

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