APPLICATION OF A COMMERCIAL NONVOLATILE RESIDUE MONITOR TO MEASURE PURITY OF SOLVENTS AND SURFACE CLEANLINESS

A nonvolatile residue monitor was used to determine the cleanliness le vels of deionized water, pure solvents, and solutions used to measure surface cleanliness by extraction. The measurement is rapid, repeatabl e, and simple to perform. With the use of calibration curves, it provi des a quantitative measure of nonvolatile residue (NVR). This method c an be used to replace other procedures that require evaporation of lar ge volumes of solvent, saving time and reducing solvent emissions. The detection limit is in the nanogram range for many common nonvolatile residues.