Abstract: A solid phase N-hydroxysuccinimide reagent having the general formula: ##STR1## where X is particulate silica gel or controlled pore glass; n=3-7; Y is either (CH.sub.2).sub.n' or (CH.sub.2).sub.n' --NH--CO--CH.sub.2 wherein n'=2-6; Z may be in the form of OCOR, OSO.sub.2 R and OCO.sub.2 R, and Z' may be either Z or OH, wherein R is a chromophore, fluorophore or electrophore capable of detection in chromatographic separation technology is disclosed. Also disclosed is the method for making compounds of this type and the method for using these compounds to identify and quantitate analytes having primary or secondary amine or thiol functionalities.

Abstract: A plasma etch process and apparatus is disclosed in which a gas mixture comprises CF.sub.3 Br, xenon or krypton, and oxygen. The plasma reactor includes a sacrificial element, preferably in the form of a graphite ring, on the lower electrode of a parallel plate reactor.