The XMAS-III

An operationally-convenient, sensitive and practical method for the determination of nanomolar dissolved reactive phosphorus (DRP) in aqueous samples was developed, based on classic phosphomolybdenum blue chemistry and solid phase extraction methodology. This work has been published on "Yuan et al., Limnology Oceanography: Methods, 2016, 14, 79-86."

2. An automated portable analyzer for week-long underway analysis of nanomolar DRP in seawater was developed. All the components of the analyzer are computer controlled using laboratory-programmed software based on LabVIEW. The system exhibited advantages of high sensitivity and reproducibility, insignificant carry-over effect and no interferences from salinity, silicate, arsenate and other P-containing compounds. The system has been successfully applied for a two-week continuous underway determination of DRP in surface seawater during a cruise in the South China Sea. Based on the laboratory and field evaluations, it is concluded that this system is suitable for accurate and high resolution underway DRP measurements in oligotrophic areas. This work is currently under review in the journal "Anal. Chim. Acta".

3. A very simple method was established for the determination of total phosphorus in natural water samples using an inexpensive portable water boiler for performing the digestion under neutral conditions. The highly water soluble sodium persulfate is used as the oxidant instead of potassium persulfate. Samples collected from rivers, estuarine, coastal sea and open oceans were analyzed, showing the successful application of this method in both environmental monitoring and marine science. This work is currently under review in the journal " Limnology Oceanography: Methods ".

4. A simple and fast method was established for the quantification of glyphosate and aminomethylphosphonic acid in seawater matrix based on the derivatization with 9-fluorenylmethylchloroformate, separation with high performance liquid chromatography and detection with fluorescence detector. Due to its simplicity, high reproducibility and successful application in seawater culture media analysis, this method is a potentially useful analytical technique for both marine research and environmental science. This work has been published on "Wang et al., Talanta, 2016, 161, 700-706".

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