17291
At the fortification levels of 20 - 200 mu g kg ( - 1 ) , average recoveries ranged from 70 % to 122 . 7 % with the RSD < 20 % .
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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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