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Application of α,α'‐dipyridyl dye for hydric soil identification
Author(s) -
Berkowitz Jacob F.,
VanZomeren Christine M.,
Currie Steven J.,
Vasilas Lenore
Publication year - 2017
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2016.12.0431
Subject(s) - hydric soil , ferrous , reactivity (psychology) , chemistry , strips , soil water , detection limit , degradation (telecommunications) , environmental science , chromatography , soil science , materials science , organic chemistry , composite material , computer science , medicine , telecommunications , alternative medicine , pathology
Core Ideas The α,α'‐dipyridyl dye displayed a ferrous iron detection limit of 0.31mg L −1 . Liquid α,α' dipyridyl dye and indicator test strips exhibited similar reactivity. Light and heat exposure led to potential α,α'‐dipyridyl dye degradation. The α,α'‐dipyridyl dye provides a tool for hydric soil and wetland identification. Chemical dyes, including α,α'‐dipyridyl, can be used to identify ferrous iron in hydric soil studies and aid in conducting wetland delineations. Indicator test strips containing α,α'‐dipyridyl have been developed; however, limited data addresses the reliability of indicator test strips and questions remain regarding potential degradation of α,α'‐dipyridyl in liquid and paper formulations. Laboratory studies found ferrous iron detection limits of 0.31 mg L −1 using both liquid and indicator test strips. The liquid dye and indicator test strips displayed similar reactivity in five soils under simulated field conditions. Results suggest that indicator test strips provide a useful tool for ferrous iron detection across a range of soil conditions. Degradation studies indicate that both liquid dye and indicator strips were impacted by light and heat exposure, with a loss of reactivity observed within as few as 3 d under extreme conditions. Maintaining both liquid dye and indicator strips in cool, dark conditions and testing reactivity with laboratory solutions will ensure the reliability of α,α'‐dipyridyl results.