IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Trace-level analysis of phosphonate in wine and must by ion chromatography with inductively coupled plasma mass spectrometry (IC-ICP-MS).

Trace-level analysis of phosphonate in wine and must by ion chromatography with inductively coupled plasma mass spectrometry (IC-ICP-MS).

Abstract

Phosphonic acid and especially potassium dihydrogen phosphonate are widely used to restrain the ubiquitous pressure of grapevine downy mildew in viticulture. Nevertheless, phosphonic acid and its derivatives have been banned in organic viticulture in October 2013, because they have been classified as plant protection products since then. This development has fueled the need for analytical methods for sensitive phosphonate determination. Current routine analysis of phosphonic acid is usually performed by ion chromatography with conductivity detection (IC-CD), which is not always sufficiently sensitive and specific. Furthermore, the quick polar pesticide evaluation method (QuPPe) of the European Reference Laboratory in combination with LC-MS/MS is well established for most polar pesticides. However, in case of phosphonic acid, issues regarding mass transitions and poor chromatographic resolution, can occur. Therefore, we sought to evaluate a new method based on IC separation coupled with ICP-MS detection as an alternative for previously described methods. By coupling an ICP-MS to an IC, non-phosphorus-containing, coeluting substances can be eliminated and thus a higher specificity can be achieved. Hence, this contribution highlights the development and validation of an IC-ICP-MS based workflow for the robust, sensitive and reliable determination of phosphonic acid at low µg/kg levels in wine and must. This method is then compared to the previous detection by CD and the advantages and disadvantages of each are briefly described. Quantification limits are 20 µg/kg or lower with % RSDs typically

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Poster

Authors

Otto Sören1, May Bianca2 and Schweiggert Ralf1

1Department of Beverage Research, Chair Analysis and Technology of Plant-based Foods, Geisenheim University
2Department of Enology, Chair Wine and Beverage Chemistry, Geisenheim University

Contact the author

Keywords

polar pesticides, IC-ICP-MS, IC-CD, phosphonic acid, organic viticulture

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

2018 updates on the agronomic performances of fungus resistant wine grapes in Trentino (Italy)

On the market there are several wine grapes which are tolerant to the main fungal diseases. These varieties, commonly defined “resistant”, were developed in the grapevine breeding programs carried out mainly in Germany, France, Hungary and Italy. Some of these cultivars have been included in the national catalogues of wine grape varieties and have sometimes been allowed for specific kinds of wine. The VEVIR project, aimed at the enological evaluation of resistant vines, involves 33 cultivars achieved at the State Institute for Viticulture Freiburg in Germany, the Research Institute of Viticulture and Enology Pecs in Hungary and the Fondazione Edmund Mach S. Michele all’Adige (FEM) in Italy.

Read More

Methodology of climate modelling using land surface temperature downscaling: case study case of Gironde (France)

Aim: Climate modelling in viticulture introduced new challenges such as high spatio-temporal monitoring and the use of dependable time series and robustness modelling methods. Land surface temperature (LST) is widely used and particularly MODIS thermal satellite images due to their high temporal resolution (four images per day).

Read More

SENSORY PROPERTIES IMPORTANT TO AUSTRALIAN FINE WINE CONSUMER SEGMENT PERCEPTION OF CHARDONNAY WINE COMPLEXITY AND PREFERENCE

Wine complexity is considered a multidimensional yet equivocal sensory percept. This project uncovered sensory attributes Australian Chardonnay wine consumers associate with Chardonnay wine complexity
and correlations between expert and consumer perceived wine complexity and preference. A
wine consumer test examined 6 Australian Chardonnay wines of three complexity levels designated low (LC1&2), medium (MC1&2), and high (HC1&2) by an expert panel (n = 8) using a benchtop sensory task. Consumers (n = 81) rated their perceived liking using a 9-point hedonic scale; wine complexity with a 5-point scale anchored “low”, “low-medium”, “medium”, “medium-high”, and “high” and lastly, profiled the wines using Rate-All-That-Apply (RATA). Psychographic segmentation with the Fine Wine Instrument
(FWI) generated three segments; Wine Enthusiasts (WE n=29), Aspirants (ASP n=40) and No- Frills (NF n=12).

Read More

Impact of monopolar and bipolar pulsed electric fields on the quality of Tinta Roriz wines

Pulsed electric fields (pef) technology holds significant promise for the agrifood industry, considering the capacity of inducing cell electroporation, due to the disruption of cellular membranes. Pef-induced permeabilization is dependent of the chosen treatment protocol (i.e. Pulse shape, electrical field strength, specific energy) and of the matrix’s characteristics (i.e. Cell radii and size, ph, electrical conductivity).

Read More

Potential application of indigenous Pichia kluyveri for enhanced wine aroma quality

Aims: In previous work, five indigenous Pichia kluyveri strains, GS1-1, FS-2-7, HS-2-1, C730 and C732, were isolated and selected from spontaneous fermented wines from Ningxia and Gansu. The aims of this study were to 1) evaluate resistance of these strains to environmental stressors that may restrict their growth and the progress of alcoholic fermentation; 2) Investigate their fermentation dynamics; 3) Characterise aroma profiles of Cabernet Sauvignon wines made from mixed cultures of P. kluyveri and Saccharomyces cerevisiae.

Read More