2004 Volume 53 Issue 10 Pages 1177-1181
The Japan Society for Analytical Chemistry (JSAC) carried out a round-robin analysis of Pb, Cd and As concentrations in a soil certified reference material (JSAC CRM 0401 Brown Forest Soil) by a method of compliance test of the Ministry of Environment (Notification 19) based on leaching with 1 mol/l hydrochloric acid. The results were consistent among the 12 laboratories involved for Pb and Cd (inter-laboratory variation: <8%); however, that for As was more variable (20.5%), probably due to unidentified analytical problem(s) related to the use of a hydride generation technique. Based on the mean values of round-robin analysis after statistical outlier rejection and additional analyses for As, the consensus values for the fractions of Pb, Cd and As leachable by the compliance test method were determined to be 14.0, 3.80 and 1.07 mg/kg, respectively.
