Determination of cobalt in forages by Zeeman electrothermal atomic absorption spectrophotometry without preliminary extraction.
A simple and rapid method, avoiding preliminary extraction, is described for the determination of Co in plant samples. The factors influencing the mineralization steps and the interference of major elements are investigated. The described method gives a recovery in the range 100-110%. Use of the standard addition method avoids interference from Ca and Fe. In the range 0.1-1 ppm (dry basis), Co can be determined with a precision of 5%. The detection limit of the method is 0.02 ppm of Co in forages.
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002417:Cattle; D003035:Cobalt / Q000032:analysis*; D008670:Metals / Q000032:analysis; D010944:Plants / Q000032:analysis; D013054:Spectrophotometry, Atomic / Q000379:methods
D008670:Metals; D003035:Cobalt