Data supplements
Supplemental Figure 1 Color change in Gastec 4LT (A, B), 4LL (C, D), and 5L (E, F) gas detection tubes, showing tubes before (B, D, F) and after (A, C, E) use.
Supplemental Figure 2 The response of the gas detection tube method (mm stain/ng hydrogen sulfide [H2S]) with changing sample volume. Measurements were performed by the N2 Method, and samples are prepared in both model wine and water. The response did not differ significantly (analysis of variance, p > 0.05) as a function of sample volume.
Supplemental Video 1 Analysis of Free Hydrogen Sulfide in Wines Using Gas Detection Tubes
https://www.youtube.com/watch?v=ulLZ75ZOzQ4
Supplemental Calculation
Theoretical mass of hydrogen sulfide (H2S), as determined from 4LT gas detection tube (GDT)
concentration markings (length of color change in mm to ng).
