Photometric accuracy and linearity test solution

Details Photometric accuracy and linearity test solution Photometric accuracy and linearity test solution

1981-12-15

1984-03-27

Gron, Teddy S.

Compositions

Nonreactive analytical, testing, or indicating compositions

436 8, 436 19, 2502521, G01N 3100, G01N 3300, G01D 1800, G01B 1300

Patent

active

044393474

ABSTRACT:
A solution of the type comprising cobalt ammonium sulfate and sulfuric acid. The solution is characterized in that it comprises from about 0.020 to about 0.040 N H.sub.2 SO.sub.4.
Also, a method for checking the linearity of response of a spectrometer or spectrophotometer. The method is of the type comprising measuring absorbance (A) or percent transmittance (%T) of a solution versus a blank at a known wavelength. The method is characterized in that the above solution is employed therein.
In addition, a method for checking photometric accuracy of a spectrometer or spectrophotometer. The method is of the type comprising measuring A or %T of a solution at a specific wavelength. The method is characterized in that the above solution is employed therein.

REFERENCES:
Rand, "Practical Spectrophotometric Standards," Clin. Chem., pp. 839-863, vol. 15, No. 9, 1969.
Lucas et al., "Spectrophotometric Standards in the Clinical Laboratory," American Laboratory, v. 9 (11), pp. 77-89.
Merck Index, 8th Ed., p. 67, "Ammonium Cobaltous Sulfate", 1968.
H. Remy, Tretise on Inorganic Chemistry, 1956, vol. 2, pp. 300-301, Elsevier Publishing Co.
Frings, "Convenient Method for Checking Detector Response of Spectrophotometers at Three Wavelengths," Clin. Chem., vol. 22, No. 1, 1976.
Frings, "Calibration and Monitoring of Spectrometers and Spectrophotometers," Clin. Chem., vol. 25, No. 6, 1979.

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