In addition to recently posted articles, we’ve put together a short-list of highlights from 2015. As a short list, we encourage you to comment on the 31P NMR articles/media/presentations that you think were most influential in 2015.
Geoderma special issue on phosphorus Several articles on the methodology and application of 31P NMR were published here.
Cade-Menun A new chemical shift library containing more than 50 P compounds has been prepared with recommendations for spiking experiments and standardized methods for the use of solution 31P NMR in soils. To read more click here.
Abdi et al. used compositional methods to improve the statistical treatment of 31P NMR data from soils. The authors report the transformation of 31P NMR proportions using isometric (ilr) and centered (clr) log ratio procedures to improve the reliability of analysis of variance procedures and the relationship of P species composition with other soil characteristics. To read more click here.
McLaren et al. Size fractionation was used to characterize the composition of P forms in soil complexes less than and greater than 10 kDa. The authors report P forms in the largest size fraction to be associated with supra-/macro-molecular complexes, which account for a broad peak in the monoester region and 61-73% of the soil organic P. To read more click here.
Jiang et al. This is another size-fractionation study with a twist: Selective extraction using oxalate and dithionite-citrate-bicarbonate to target P bound to crystalline and amorphous iron and aluminum hydroxides. The authors report the distribution of P forms to be independent of size-fraction in the soils tested and found the majority of alkaline extractable P (42-47%) to be associated with amorphous metal oxides. Still, 7-15% of residual P was found to be unaffected by these extracts. What could it be? To read more click here.
Doolette and Smernik This mini-review published in Magnetic Resonance in Chemistry describes spectral processing techniques commonly used in biomedical applications, which could improve the quantification of overlapping and broad 31P NMR signals commonly found in soil analyses. To read more click here here.
Don’t forget your pop-corn! Last but not least, a message on why methods such as 31P NMR improve our understanding of environmental P dynamics and the ability to tackle issues of agricultural nutrient efficiency and pollution. Watch the movie here.
What will 2016 bring? Stay tuned…