There shall be clear preference, certainly in case of confirmatory methods, of using all 17 13C-labelled 2,3,7,8-substituted internal PCDD/F standards and all 12 13C-labelled internal dioxin-like PCB standard.
Abu Rusdan [alias: a) Abu Thorik, b) Rusdjan, c) Rusjan, d) Rusydan, e) Thoriquddin, f) Thoriquiddin, g) Thoriquidin, h) Toriquddin]EurLex-2 EurLex-2