Copper-complexed hydrogen sulfide in wine: Measurement by gas detection tubes and comparison of release approaches

Y Chen, JA Jastrzembski… - American Journal of …, 2017 - Am Soc Enol Viticulture
Recent work suggests that copper complexes may serve as a latent source of free hydrogen
sulfide (H2S) and other malodorous volatile thiols during wine storage. However …

Brine-releasable hydrogen sulfide in wine: Mechanism of release from copper complexes and effects of glutathione

RB Allison, GL Sacks - Journal of Agricultural and Food Chemistry, 2021 - ACS Publications
Copper–sulfhydryl complexes in wine can be disrupted by addition of brine to release free
hydrogen sulfide (H2S), and the resulting “brine-releasable H2S” is reported to correlate …

[HTML][HTML] Formation of hydrogen sulfide in wine: Interactions between copper and sulfur dioxide

MZ Bekker, ME Smith, PA Smith, EN Wilkes - Molecules, 2016 - mdpi.com
The combined synergistic effects of copper (Cu2+) and sulfur dioxide (SO2) on the formation
of hydrogen sulfide (H2S) in Verdelho and Shiraz wine samples post-bottling was studied …

Reaction mechanisms of metals with hydrogen sulfide and thiols in model wine. Part 1: Copper-catalyzed oxidation

GY Kreitman, JC Danilewicz, DW Jeffery… - Journal of agricultural …, 2016 - ACS Publications
Sulfidic off-odors as a result of hydrogen sulfide (H2S) and low-molecular-weight thiols are
commonly encountered in wine production. These odors are usually removed by the …

The effects of pH and copper on the formation of volatile sulfur compounds in Chardonnay and Shiraz wines post-bottling

MZ Bekker, A Mierczynska-Vasilev, PA Smith… - Food Chemistry, 2016 - Elsevier
The effects of pH and Cu 2+ treatment on the formation of volatile sulfur compounds (VSCs)
were investigated in Chardonnay and Shiraz wine samples. Four VSCs were significantly …

The effects of copper fining on the wine content in sulfur off-odors and on their evolution during accelerated anoxic storage

E Vela, P Hernández-Orte, E Franco-Luesma… - Food Chemistry, 2017 - Elsevier
Three different red wines with reductive character have been treated with two different doses
of copper sulfate (0.06 and 0.5 mg/L) and with a commercial copper-containing product at …

Copper (II)-mediated hydrogen sulfide and thiol oxidation to disulfides and organic polysulfanes and their reductive cleavage in wine: Mechanistic elucidation and …

GY Kreitman, JC Danilewicz, DW Jeffery… - Journal of agricultural …, 2017 - ACS Publications
Fermentation-derived volatile sulfur compounds (VSCs) are undesirable in wine and are
often remediated in a process known as copper fining. In the present study, the addition of …

Analysis of free hydrogen sulfide in wines using gas detection tubes

RB Allison, A Montgomery… - American Journal of …, 2022 - Am Soc Enol Viticulture
Summary Goals: Hydrogen sulfide (H 2 S,“rotten egg” aroma) concerns winemakers due to
its contribution to sulfur-like off-aromas, and convenient methods are needed for quantitation …

Evaluation of putative precursors of key 'reductive'compounds in wines post-bottling

MZ Bekker, EN Wilkes, PA Smith - Food chemistry, 2018 - Elsevier
Precursors to hydrogen sulfide (H 2 S), methanethiol (MeSH), ethanethiol (EtSH), and
dimethyl sulfide (DMS) were assessed in wines post-bottling, and the percent yield of VSCs …

Role of Elemental Sulfur in Forming Latent Precursors of H2S in Wine

JA Jastrzembski, RB Allison, E Friedberg… - Journal of agricultural …, 2017 - ACS Publications
The level of hydrogen sulfide (H2S) can increase during abiotic storage of wines, and
potential latent sources of H2S are still under investigation. We demonstrate that elemental …