Ricca Chemical Co.

Buffer, pH 6.4, for Wright's

TOTAL ORGANIC CARBON STANARD 2.0 PPM EPA 415 AQUEOUS SOLUTION

Carbon Std, Organic, 5 ppm C

Carbon Std, Inorg, 1000 ppm C

Carbon Std, Inorg, 25 ppm C

Carbon Std, Inorg, 50 ppm C

Carbon Std, Org, 100 ppm C

TOTAL ORGANIC CARBON STANARD 125.0 MG/L (PPM) EPA 415 AQUEOUS SOLUTION

Carbon Std, Organic, 5 ppm C

Copper Sulfate, 1.055 SG

Formaldehyde, 5% v/v

Formaldehyde, 10% v/v

Formaldehyde, 10% v/v, pH 7.4

Gentian Violet, 1% w/v Aqueous

Gentian Violet, 2% Methanolic

Gold Chloride, 1% w/v