12652
For urine , sample clean - up by an immunoaffinity column ( CitriTest ( (R) ) ) proved to be clearly superior to SPE with RP ( 18 ) material for subsequent analysis by LC - MS / MS .
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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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