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Performance of several library search algorithms (against EI mass spectral databases) implemented in commercial software products (ACD/SpecDB, ChemStation, GC/MS Solution, and MS Search) was estimated. Test set contained 1000 mass spectra, which were randomly selected from NIST’08 (RepLib) mass spectral database. It was shown that composite (also known as identity) algorithm implemented in ms search...

Deformulation, breaking down drug products into components is vital but traditionally slow and complex. Modern workflows integrate LC/MS, GC/MS, automation, and centralized databases to streamline analysis, boost reproducibility, and accelerate decisions. ACD/Labs software helps scientists cut effort, improve accuracy, and stay competitive.

Searching for unknowns across an internal library or database can serve as a major time saver. A more accessible database is the Internet. Many chemists and elucidators search the World Wide Web using a mass, a molecular formula or a fragment. Be aware that proprietary data sent over the Internet runs the risk of being...

A previous blog described the Internet as a valuable tool in searching for previous work based on a molecular formula. In addition to searching the Internet “directly”, certain online sites can assist and facilitate the search process. Some of these sites are free while others have a fee. Be aware that the Internet is full...

The nomenclature rules for organic compounds set by the International Union of Pure and Applied Chemistry (IUPAC) committee (http://www.iupac.org/) do offer flexibility in some areas especially in cases where old publications have old terms. Below are some examples. The answers for the structures, as based on the IUPAC nomenclature rules, are listed below. Some links...

Combination of FDM’s proprietary data and ACD/Labs’ newest Optical spectroscopy interpretation and management software promises powerful database searching and matching Orlando, FL (March 9, 2012)—Advanced Chemistry Development, Inc., (ACD/Labs, Pittcon Booth 1174) and FDM (Fiveash Data Management, Inc., Pittcon Booth 2846) are pleased to announce that ACD/Labs Spectrus Processor and Optical Workbook software for processing,...