High-Definition X-Ray Fluorescence: Applications

Table 4

Measured As and Pb levels in five reference urine samples compared with the results of an interlaboratory study by ICP-MS measurements.

Sample	As (𝜇g/L, ppb)		Pb (𝜇g/L, ppb)
	HD XRF	ICP-MS	HD XRF	ICP-MS
EU03-1	<35	11.8±2.1	80±25	79.4±4.4
EU03-2	<35	3.2±0.9	<40	<0.7
EU03-3	154±15	158.9±7.7	524±25	528±26
EU03-4	40±12	56.8±3.0	212±20	224.8±8.3
EU03-5	104±18	114.8±5.0	<40	5.2±1.5