| 21. | This leads to a colour change, which can be measured using a spectrophotometer.
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| 22. | He established Dobson ozone spectrophotometer stations in India.
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| 23. | Atomic absorption spectrophotometer, nitrogen analyzer, ion meter etc . are available here.
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| 24. | Historically, spectrophotometers use a monochromator containing a diffraction grating to produce the analytical spectrum.
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| 25. | Flame photometry is crude but cheap compared to spectrophotometer ( which uses a monochromator ).
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| 26. | He calibrated an instrument called the Dobson Ozone Spectrophotometer which provided data on atmospheric ozone.
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| 27. | In comparison, in 1943, the GE Hardy Spectrophotometer cost $ 6, 400.
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| 28. | They are therefore used as a calibration standard for optical spectrophotometers, and are available commercially.
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| 29. | Consequently, the use of Raman spectroscopy dwindled when commercial spectrophotometers became available in the 1940s.
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| 30. | To measure the sample, the transparent side must be placed toward the light in spectrophotometer.
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