Δ34S
= Δ34S
{wiki=Δ34S}
Δ⁻⁴S (delta sulfur-34) is a notation used in geochemistry and environmental science to express the isotopic composition of sulfur in a sample relative to a standard. Specifically, it refers to the ratio of sulfur-34 (¹⁴S) to sulfur-32 (¹³²S) isotopes.