In common with Method 14F5a, SO4-S and other anions including Cl–, F–, NO3-N and PO4-P, are included in the analytical suite described in more detail in Method 14E2b. Alternative IC technology, based on chemical suppression of eluent conductivity is provided as Method 14F5a.
As for Method 5A3b and Method 14E2b.
Analyse an aliquot of the SE (no particles >0.20 μm) by IC (single-column with electronic suppression of eluent conductivity) as outlined in Method 14E2b.
Report SO4-S/SE concentrations in cmolc/L with relevant method codes, or multiply by 16.03 to convert to mg SO4-S/L.