VII. CONCULSION
Although conventional flame emission and atomic absorption continue to serve as reliable and convenient methods of analysis at low concentrations, considerable research efforts, notably the development of non-flame atomizers, have extended atomic spectrometry into the range of trace and ultratrace analysis. Relatively few other analytical techniques are useful at concentration levels of 1 ppb or less, and none is as inexpensive, rapid, and readily available to most laboratories as atomic spectrometry.