Trace Environmental Quantitative Analysis, 2nd Edition

摘要

A scant thirty years ago, if one was able to measure parts per million it was a major achievement. Now, with the advent of more and more sophisticated equipment, parts per billion—or even less—is achievable with relative ease. Despite these advances in technology, qualitative analysis has always been much easier than quantitative analysis. To determine the presence of a material is one thing, but to perform the rigorous task of determining precisely how much—well, there lies the challenge.