00429nam a2200157Ia 4500001000900000003000500009005001700014008004100031010001100072040000900083082001400092110004800106245008400154260002500238300000800263dia_1601CHAP20251023164031.0220117s1990    xx            000 0 und d  a172146  cCHAP  a630.24 A8  aAssociation of Official Analytical Chemists  aOfficial Methods of Analysis of the Association of Official Analytical Chemists  aWashinton. S.Ec1990  a2 v