15615
( 13 ) C / ( 12 ) C analysis was conducted on these adulterated honey samples using an isotope ratio mass spectrometer in combination with an elemental analyser ( EA - IRMS ) .
 Chemical: ( 13 ) C; Chemical: ( 12 ) C
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ( 13 ) C; Chemical: ( 12 ) C