Effect of removal of organic material on stable isotope values in skeletal carbonate from taxonomic groups with complex mineralogies

Rapid Communications in Mass Spectrometry : RCM
Marcus M KeyJeffrey S Forrester

Abstract

Stable O and C isotope ratios are one of the most accurate ways of determining environmental changes in the past, which are used to predict future environmental change. Biogenic carbonates from marine organisms are the most common source of samples for stable isotope analysis. Before they are analyzed by mass spectrometry, any organic material is traditionally removed by one of three common pretreatment methods: roasting, bleaching, or with hydrogen peroxide at various strengths and durations. This study compares δ18 O and δ13 C values in a control with no pretreatment with five different pretreatment methods using conventional acid digestion mass spectrometry. The objectives are to: assess the impact of the most common pretreatment methods on δ18 O and δ13 C values from (1) taxonomically underrepresented groups in previous studies, and (2) those that precipitate a wide range of biomineralogies, in the debate of whether to pretreat or not to pretreat. We analyzed the following biomineralogically complex temperate marine organisms from southern New Zealand: four species of bryozoans, four species of molluscs, two species of arthropods, and one species each of annelid, red alga, brachiopod, and echinoderm (test plates and spines ...Continue Reading

References

Feb 19, 2003·Rapid Communications in Mass Spectrometry : RCM·K R R A GuiguerM Power
May 27, 2003·Journal of Human Evolution·Nikolaas J van der MerweJulie Luyt
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Jan 3, 2013·Rapid Communications in Mass Spectrometry : RCM·Vaughan Grimes, Maura Pellegrini
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May 10, 2013·The Journal of Small Animal Practice·M ScottJ Currall
Sep 26, 2015·Rapid Communications in Mass Spectrometry : RCM·Amanda J Waite, Peter K Swart

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