Silica

Silica (SiO2)

Silica (silicon dioxide), in some cases, is an anion.

The chemistry of silica is a complex and somewhat unpredictable subject.

In similar fashion as TOC reports the total concentration of organics (as carbon) without detailing what the organic compounds are, silica reports the total concentration of silicon (as silica) without detailing what the silicon compounds are.

The "Total Silica" content [....]