Code

Description

Unit

NIST-2193a

Calcium carbonate pH standard

30 g

NIST-2192a

Sodium carbonate (see also 2191a)

30 g

NIST-2191a

Sodium bicarbonate (see also 2192a)

30 g

NIST-2186-II

Disodium Hydrogen Phosphate

30 g

NIST-2185

Potassium hydrogen phthalate (see also 2186-I)

60 g