2002•Physical Testing and Chemical AnalysisRequires access
DIRECT FLAME ATOMIC EMISSION SPECTROMETRIC DETERMINATION OF POTASSIUM AND CALCIUM IN HONEY
Huang Ming-fu
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Abstract
A rapid and direct method for the determination of potassium and calcium in honey by flame atomic emission spectrometry was reported. A transparent and homogeneous sample solution was obtained by dissolving the honey in HNO 3(1+1) upon slight heating. For the elimination of interferences, appropriate amounts of sodium chloride solution as de-ionization agent in the determination of potassium, and lanthanum(Ⅲ) solution as releasing agent in the determination of calcium were added to the sample solution. The working curve method was applied to the determination and blank solution was used as reference. RSD′s were found to be less than 1%, and recoveries obtained were in the range 98.4%～103.7%. The detection limits (3σ/S) were found to be 0.012mg·L -1 for potassium and 0.030mg·L -1 for calcium.