Reference Spectrograms and Spectral Retrieval Systems

Currently the largest publisher of reference spectrograms is the Sadtler Research Laboratories of Philadelphia. In addition to the spectrograms, Sadtler markets a spec-finder which aids in locating spectra in this collection. The spectra are cross-referenced to the ATSM-IBM cards, so that laboratories having the IBM card deck can use this technique to sort the Sadtler spectra. These spectrograms are classified as either standard or commercial. 

The standard spectra are run using pure compounds and include the common organic reagents. The commercial series includes dyes, stains, plasticizers, monomers, polymers, polyols, resins, rubbers, soaps, fatty acids and drying oils, solvents, surface-active agents, textile chemicals, waxes, petroleum chemicals, intermediates, and pharmaceuticals. These spectra reflect the materials as they are available commercially, and list their trade as well as chemical names. 

The indices available with the spectra are divided into alphabetical, numerical, molecular formula, and chemical classes. In addition, the spec-finder can be used to locate spectra by band position. Computer service for locating spectra is also available from the Sadtler laboratories. 

Physical data such as melting points are included on the spectrograms. The technique used to obtain the spectrum is stated on the spectrogram. 

Coblentz Society Spectra (published by the Sadtler Research Laboratories) 

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