ASTM D 6739 - 11 (Reapproved 2015) Standard Test Method for Silica-pH Value

Current edition approved Nov. 1, 2015. Published December 2015. Originally approved in 2001. Last previous edition approved in 2011 as D6739 – 11. — 2 p.
This test method is used to measure the pH of a 5 % silica/water suspension or mechanical dispersion and is indicative of the relative acidity or alkalinity of the silica.