Classical Analytical Chemistry Portal

The Chemical Sciences Division serves as the Nation’s reference laboratory for chemical compositional measurements and standards to … more

The pH metrology program supports traceability for pH measurements. This traceability rests on primary pH measurements in an ideal electrochemical … more

Research activities in separation science continue to focus on investigations of the fundamental physical and chemical processes that influence … more

Gravimetric and optical methods were developed to assure quantitative deposition of compounds from nano-dispense devices onto the surfaces of … more

NIST assigns assay values for a suite of high-purity reagents using two techniques: coulometry and titrimetry. Coulometry is based on … more

Our goal is to develop new methods to rapidly screen bulk carbon nanotubes for chemical purity and homogeneity. The different synthesis routes … more