6869
Studies at three fortification levels for the toxins in the range of 8 . 1 - 225 . 5 mu g / kg gave mean recoveries from 71 . 3 % to 104 . 6 % with relative standard deviation ( RSD ) <= 15 . 8 % .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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