SPC file format
The SPC file format is a file format in which all kinds of spectroscopic data, including amongst others infrared spectra, Raman spectra and UV/VIS spectra. The format can be regarded as a database with records of variable length and each record stores a different kind of data (instrumental information, information on one spectrum of a dataset, the spectrum itself or extra logs). It was invented by Galactic Industries as generic file format for its programs. Their original specification was implemented in 1986, but a more versatile format was created in 1996.
Galactic Industries was purchased by Thermo Fisher Scientific who now maintain and develop the GRAMS Software Suite for which the format was defined. They provide free tools and libraries to allow developers to create and maintain SPC files in a consistent manner.
This file format is not an open type, such as XML or CSV, but is a binary format and is therefore not readable with a standard text editor but requires a special reader or software to interpret the file data. The Environmental Protection Agency publishes a free spectra reader called ShowSPC that is open to the public for reading spectra data. Additionally a company AnalyzeIQ produces a free SPC to CSV converter aptly titled SPC2CSV, an open source project OpenSpectralWorks is an alternative free reader, as well as the handy SpectraGryph which has analytic and display capabilities for reading SPC files. The Essential FTIR software offers a file reader that can read, display, analyze and export .spc files as well as many other spectroscopy file formats.
An SPC file can also refer to a spectral curve data file of a proprietary binary format created by Shimadzu Corporation's line of spectrophotometers.
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