Quantitative analysis of polyhexamethylene guanidine (PHMG) oligomers via matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry with an ionic‐liquid matrix
1. Department of Chemistry, Sogang University, Seoul, Korea;2. Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Korea;3. Institute of Environmental Protection and Safety, NeoEnBiz Co., Bucheon, Korea