Considering the interrelation between chemical analysis and instrumental analysis in content, Analytical Chemistry (5th Edition) made appropriate adjustments to the chapters of the original textbook, and integrated the original two sets of textbooks into one set, which was divided into two volumes.
In fact, the chemical analysis part of the two textbooks has not changed much. Chapters have been adjusted and exercises have changed. The main content is still similar, but the new version is better. Personally, I think the cover is a little better than the fourth edition.