Available Ray-Ban Lens Options. There are many different sunglass options besides polarized lenses available to Ray-Ban buyers. While polarized lenses are a great choice, they aren't for everyone-knowing the differences between lens options can make for a better purchase.
Products. Chemical Methods, Inc. is a leading supplier of industrial chemicals used in factories that make metal products. We develop outstanding alkaline cleaners, acidic cleaners, paint pretreatment chemistry, metalworking fluids and corrosion inhibitors.
Organic compounds were traditionally characterized by a variety of chemical tests, called wet methods, but such tests have been largely displaced by spectroscopic or other computer-intensive methods of analysis. 1  Listed in approximate order of utility, the chief analytical methods are: