1. Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
2. Department of Oils, Oleochemicals and Surfactants Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, India
3. Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India