منابع مشابه
Logarithmic recording spectrophotometer for densitometry and flow spectrophotometry.
A system is described for the conversion of a Beckman DU spectrophotometer to automatic recording-integrated densitometry. This system has also been applied to flow spectrophotometry with a wide-range monochromatic system substituted for the filter photometer of the Technic on AutoAnalyzer. A log converter is used which changes the impulse from linear to logarithmic and feeds this to the record...
متن کاملRounding error, an unexpected fault in the output from a recording spectrophotometer: implications for model discrimination.
Although commonly ignored in discussions of experimental error, rounding may sometimes be the major source of error, especially with modern precision instruments: some recording spectrophotometers are optically and photometrically capable of making absorbance measurements with errors less than 0.0003, but provide no numerical information more precise than +/- 0.001. The problem may be diagnosed...
متن کاملSuction spectrophotometer cell.
A spectrophotometer cuvet is described which is emptied by suction without removal from the instrument. The use of this cuvet saves time and minimizes the chance of breakage. Data from C " measurements and absorbances of a dye solution show minimal retention error from successive specimens. expended in determining the absonbances of a large series of individual samples in a spectrophotometer ca...
متن کاملStraylight error in a spectrophotometer.
HE PRINCIPAL SUBJECT MATTER of this paper is the description of a thod of obtaining a calibration curve relating apparent absorbancy 81) and concentration (x). It is frequently observed that the orbancy index decreases with increasing concentration in cases in ich one would expect Beer’s law, A = log(10/I) = KX, to hold. For ample, with our instrument, the absorbancy index at 273.5 m of a lutio...
متن کاملCommercial spectrophotometer for particle sizing.
Particle-size distribution and the concentration of polystyrene particles suspended in water were accurately recovered from the inversion of spectral extinction data measured with a commercial spectrophotometer. The instrument was modified by placing a spatial filter in the collection optics to prevent low-angle scattered light from affecting the measurement of transmitted power. The data were ...
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ژورنال
عنوان ژورنال: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
سال: 1953
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij1917.37.219