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ALS Scandinavia has analyzed human liver and kidney for a range of elements within an interlaboratory comparison program, results from which are given in Table 8. In this program, tissues are analyzed as unknown samples by a number of ICP-MS laboratories worldwide.
The application of ICP-SFMS to various animal tissues has recently been evaluated ( 11). These include fish muscle and liver, porcine muscle, and rabbit liver, lung, kidney and brain which were analyzed following microwave-assisted digestion in high-purity nitric acid. Accuracy was assessed for 37 elements by means of certified reference materials, and good agreement was found with certified or recommended values for at least 33 of these. |
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Out of 68 elements, 58 were detectable in all sample types investigated. The sample amount used was relatively high (ca 1 g wet weight), and it was concluded that analyses for part of the elements in much smaller samples might require modifications in the sample preparation method.
Comparisons were also made between ICP-SFMS and ICP-OES results for these sample types. For higher concentrations, the two methods generally agreed within a few percent, while ICP-OES results were less reliable at sub-µg/g levels.
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