Trace determination of free formaldehyde in DTP and DT vaccines and diphtheria–tetanus antigen by single drop microextraction and gas chromatography–mass spectrometry

2009 ◽  
Vol 50 (3) ◽  
pp. 287-292 ◽  
Author(s):  
Habib Bagheri ◽  
Mahnaz Ghambarian ◽  
Amir Salemi ◽  
Ali Es-Haghi
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