Abstract
AbstractThree chemical and two instrumental methods for determining phosphorus in crude and refined canola oils were compared with the official AOCS method. Of the three different digestion‐spectrophotometric procedures examined, the oxygen bomb combustion method appeared to offer the best combination of speed, accuracy and precision. In contrast, the perchloric acid procedure was faulted for poor agreement with the AOCS procedure and poor reproducibility between batches, whereas the saponification procedure was very labor intensive and exhibited poor precision. Of the two instrumental methods examined, atomic absorption spectrophotometry was found to be more sensitive than molecular emission cavity analysis although both procedures were reported to be unsatisfactory in detecting inorganic phosphorus.
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