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目的建立微波灰化、分子吸收光谱法测定食品中磷的方法。方法用微波灰化法使样品灰化,其测定结果与国标方法比较。结果用微波灰化法消化样品,精密度试验RSD=1.5%,回收率在90.0%～95.8%之间,与国标法比较,测定结果差异无统计学意义。结论用微波灰化法测定食品中磷含量,方法准确性高,重现性好,值得推广。
Objective To establish a method for the determination of phosphorus in food by microwave ashing and molecular absorption spectrometry. Methods The samples were ashed by microwave ashing method. The results were compared with the national standard method. Results The samples were digested by microwave ashing method. The precision test was RSD = 1.5% and the recovery was between 90.0% and 95.8%. Compared with the national standard method, the difference was not statistically significant. Conclusion The determination of phosphorus in food by microwave ashing method has the advantages of high accuracy, good reproducibility and worthy of popularization.