A single-beam instrument is less complicated and less expensive than a double-beam instrument. In a single-beam instrument, there is only one path that light takes through the instrument from the light source to the detector (i.e., as the light travels through a sample,
standard, or blank).
In a double-beam instrument, both the sample and a reference blank are examined simultaneously. However, in a single-beam instrument, the blank must be read to set up the instrument and then the sample is looked at later.
If any instrumental parameters have changed between examining the blank and the sample, a serious error may occur.
A single-beam instrument is less complicated and less expensive than a double-beam instrument. In a single-beam instrument, there is only one path that light takes through the instrument from the light source to the detector (i.e., as the light travels through a sample, standard, or blank).In a double-beam instrument, both the sample and a reference blank are examined simultaneously. However, in a single-beam instrument, the blank must be read to set up the instrument and then the sample is looked at later. If any instrumental parameters have changed between examining the blank and the sample, a serious error may occur.
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