17295
The chromatographic separation was performed on an ODS - 2 C18 column ( 250 mm x 4 . 6 mm , 5 . 0 microm particle size ) with a simple elution programme .
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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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