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…

EFFECTIVENESS OF APPLIED MATERIALS IN REDUCING THE ABSORPTION OF SMOKE MARKER COMPOUNDS IN A SIMULATED WILDFIRE SCENARIO

Smoke taint (ST) is a grape-wine off-flavour that may occur when grapes absorb volatile phenols (VPs) originating from wildfire smoke (1). ST is associated with the negative sensory attributes such as smoky and ashy notes. VPs are glycosylated in the plant and thus present in both free and bound forms (2; 3). Wildfire smoke has resulted in a decline in grape and wine quality and financial losses which has become a prominent issue for the global wine industry.

Read More

Field-grown Sauvignon Blanc berries react to increased exposure by controlling antioxidant homeostasis and displaying UV acclimation responses that are influenced by the level of ambient light

Leaf removal in the bunch zone is a common viticultural practice with several objectives, yet it has been difficult to conclusively link the physiological mechanism(s) and metabolic berry impact to this widely practiced treatment. We used a field-omics approach1 in a Sauvignon blanc high altitude model vineyard, showing that the early leaf removal in the bunch zone caused quantifiable and stable responses (over years) in the microclimate where the main perturbation was increased exposure. We provide an explanation for how leaf removal leads to the shifts in grape metabolites typically linked to this treatment and confirm anecdotal evidence and previous reports that leaf removal treatment at an early stage of berry development affects “quality-associated” metabolites (monoterpenes and norisoprenoids).

Read More

Effet de l’ombrage respectif des ceps et des grappes de Muscat sur leurs teneurs en composés volatils libres et glycosyles et en précurseurs d’aromes carotenoïdiques

Le Muscat de Frontignan est bien connu pour ses fortes teneurs en composés terpéniques et par l’odeur florale et fruitée que ces composés confèrent aux vins qui en sont issus (1,2).

Read More

Terroir and climate: the role of homoclime matching

Climate is an important component or determinant of terroir, especially at the regional level. One can define three levels of terroir. These are the macro– or regional scale, which applies over tens of kilometres of the landscape. The second level is the meso- scale, which applies over kilometres or hundreds of meters, at the individual vineyard scale.

Read More

Water relations of woody perennial plant species

Field irrigation experiments were performed on young « Nonpareil » almond trees, mature « Bartlett » pear trees and mature « Pinot Noir » grapevines, to determine the relation of a number of alternative measures of plant water status (predawn and midday stem and leaf water potential), to a number of indices of plant physiological activity (leaf conductance, vegetative growth and fruit growth and composition).

Read More