“…XRFS has been the analytical method of choice in surveys throughout the world: e.g. Tallinn, Estonia (Bityukova et al, 2000); Berlin, Germany (Birke and Rauch, 2000); Pforzheim, Germany (Norra et al, 2006); 21 cities in Great Britain (Fordyce et al, 2005); Galway, Ireland (Carr et al, 2008); Palermo, Italy (Manta et al, 2002); Zurich, Switzerland (Gehrig et al, 2007); Dhaka, Bangladesh (Ahmed et.al, 2007); Xuzhou, China (Wang et al, 2005); Kolkata, India (Gupta et al, 2007); Ruseifa, Jordan, (Al-Jundi and Al-Tarazi, 2008); Roxbury and Dorchester, Massachusetts, USA (Clark et al, 2006).…”