The left ventricular ejection fraction (LVEF) test rate is increasingly used as a quality of care indicator for pa-. tients with heart failure. Our study produced benchmark LVEF test rates in a Medicare fee-for-service.
Toluene is a very good solvent because, unlike water, it can dissolve many organic compounds. In many commercial products, toluene is used as a solvent that is present in paint thinners, nail polish remover, glues, and correction fluid. Toluene has many uses in different industries.
The pins and edge connectors came from 2 old computer motherboards and a few sticks of computer memory. There is gold to be found in computer parts but usually it's just a very thin coating ... still, gold is gold ! To dissolve the metal contaminants, we need to use a 50/50 mixture of nitric acid and water. The amount of nitric acid required will be approximately 20 mls mixed with approximately 20 mls of water. Using the plastic pipette, the water is added first followed by the nitric acid.