S.L. 437.82 Art. 7carried out on concerned up from 50 - 10 from 100 and - 5% of 200 mg/kg. 8. The prese determination addition of ratio: Ca addition of calibration

REPEATABILITY The difference between the results of zwo parallel determinations the same sample by the same analyst should not exceed: - 5' mg/kg, in absolute value, for contents of the trace element to 50 mg/kg; - 10% of the higher result for contents of the trace element concerned and up to 100 mg/kg; mg/kg, in absolute value, for contents of the trace element concerned up to 200 mg/kg; the higher result for contents of the trace element concerned above

OBSERVATION

nce of large quantities of phosphates may interfere with the of iron, manganese and zinc. Such interference must be corrected by lanthanum chloride solution (3.11). If, however, in the sample the weight

+ Mg 2, P

lanthanum chloride solution (3.11) to the solution for analysis and to the solutions may be omitted.