National ambient air quality standards designed to protect human health with an adequate margin for safety. (See National Ambient Air Quality Standards, secondary standards.)
Found on
https://www.encyclo.co.uk/local/20094
Aqueous pH buffer solutions established by the National Bureau of Standards within the 2.5 to 11.5 pH range of ionic strength less than 0.1 and which provide stable liquid junction potential and uniformity of electrode sensitivity.
Found on
https://www.encyclo.co.uk/local/20850
No exact match found.
