A pilot study for the preparation of a new Reference Material based on antarctic krill |
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Authors: | S Caroli O Senofonte S Caimi P Pucci J Pauwels G N Kramer |
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Institution: | (1) Istituto Superiore di Sanità, Viale Regina Elena 299, I-00161 Rome, Italy, IT;(2) Institute for Reference Materials and Measurements, Joint Research Centre, European Commission, Retieseweg, B-2440 Geel, Belgium, BE |
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Abstract: | The preparation of new Certified Reference Materials (CRMs) of antarctic matrices forms the backbone of an ongoing project
in the framework of the Italian National Program for Antarctic Research. The first CRM of this kind (MURST-ISS-A1 Antarctic
Marine Sediment) is already available. The second phase focuses on the certification of antarctic krill, a small shrimp extremely
abundant in the Southern Ocean. The total mass of krill available for this purpose is approximately 44 kg and results from
the combination of three different catches (Ross Sea, Marguerite Bay and Livingston Island, respectively). The quantification
of the following elements in the raw mass appears to be affordable by current analytical techniques, values being in the range
of (in μg/g) 0.11–0.30 for As, 0.03–0.12 for Cd, 0.06–0.23 for Cr, 6.1–21 for Cu, 5.7–7.6 for Fe, 0.005–0.008 for Hg, 0.7–1.2
for Mn, 0.013– 0.077 for Ni, 0.04–0.57 for Pb and 12–16 for Zn. On the other hand, the average values ascertained in freeze-dried
krill are as a rule one order of magnitude higher, i.e., (in μg/g), 3.2 for As, 0.6 for Cd, 1.8 for Cr, 75 for Cu, 61 for
Fe, 0.025 for Hg, 4.6 for Mn, 0.7 for Ni, 2.1 for Pb and 81 for Zn. Information on the pretreatment of krill and details on
the planned certification campaign are also given.
Received: 10 June 1997 / Revised: 24 September 1997 / Accepted: 28 September 1997 |
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