Determination of phosphorus in food samples by X-ray fluorescence spectrometry and standard spectrophotometric method

The Wavelength Dispersive X-ray fluorescence (WD XRF) determination of phosphorus in GMO and non GMO food samples is proposed. The tested materials included commercially available transgenic, unmodified soya-foods and popular dairy products. The WD XRF method was compared with the standard molybdenum blue method. Matrix effects were minimised by using standard reference material. Obtained results were discussed in respect of the accuracy, statistical parameters and values recommended by the Recommended Dietary Allowance (RDA). The results indicate the validity of the proposed methods to routine food analysis.