1. Applied Environmental Research Laboratories (AERL), Department of ChemistryVancouver Island University Nanaimo BC V9R 5S5 Canada
2. Department of ChemistryUniversity of Victoria Victoria BC V8P 5C2 Canada
3. LifeLabs Medical Laboratories Burnaby BC V3W 1H8 Canada
4. LC‐MS Laboratory, Department of Pure and Applied SciencesUniversity of Urbino Carlo Bo 61029 Urbino Italy
5. Department of ChemistrySimon Fraser University Burnaby BC V5A 1S6 Canada
6. Department of Environmental and Occupational Health SciencesUniversity of Washington Seattle WA 98195