Abstract
A simple and eco‐friendly procedure for determining total phosphate content in water has been developed by combining a miniaturized ion‐associated complex‐based preconcentration method with energy‐dispersive X‐ray fluorescence spectrometry (EDXRF). The method is based on indirect determination of phosphorus using molybdenum present in the ion‐associated complex formed by 12‐molybdophosphate and crystal violet. Since phosphorus is determined indirectly, via fluorescent radiation of molybdenum, the difficulties stemming from low fluorescence yield and low energy of phosphorus radiation can be successfully overcome. A good mole ratio of phosphorus to molybdenum (1:12) and a sensitive Kα line of molybdenum make it possible to determine low phosphorus concentrations. Under optimized conditions, a good linearity (up to 2 μg mL−1 of phosphorus, r = 0.9991), and a detection limit of 1.3 ng mL−1 were achieved. The total relative standard deviation (RSD) for EDXRF determination of phosphorus, following precipitation of the ion‐associated complex and its dissolution in a microdrop of 1‐hexanol was 2.6%. The enrichment factor was 167. The developed method was used to determine total phosphate content in surface waters. The reliability of the proposed methodology was tested with the use of samples spiked with a known concentration of the determined element and by comparative inductively coupled plasma‐optical emission spectrometry. The recovery (in the range of 93.5–97%) was satisfactory and indicates usefulness of the developed procedure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.