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Thus , we emphasize an alternative strategy , based on a global , new and easy - to - follow methodology , to screen and perform determination of PPB , using orthogonal techniques ( i . e . liquid chromatography , capillary electrophoresis ( CE ) , surface plasmon resonance ( SPR ) based biosensor ) .
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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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