Compositions – Nonreactive analytical – testing – or indicating compositions
Patent
1981-12-15
1984-07-24
Gron, Teddy S.
Compositions
Nonreactive analytical, testing, or indicating compositions
252 1, 2502521, 436 8, 436 19, C09K 300, G01N 3100, G01N 3300
Patent
active
044617186
ABSTRACT:
A wavelength calibration solution comprising from about 0.025 to about 0.140 molar neodymium and from about 0.135 to about 0.550 molar samarium, wherein the neodymium is present as a neodymium ionized constituent and the samarium is present as a samarium ionized constituent.
A method for checking the wavelength accuracy of spectrometers or spectrophotometers of the type comprising measuring the absorbance (A) or percent transmittance (% T) of a wavelength calibration check solution versus a blank at more than one wavelength. The method is characterized in that the above solution is employed therein as the wavelength calibration check solution.
REFERENCES:
West, "Practical Standards for UV Absorption . . . ", American Laboratory, Mar. 1977, pp. 37-49.
Merck, Index, 8th Ed., 1968, p. 798, Merch & Co., Inc., "Perchloric Acid".
Bernard, "The Liq-QA-Pac.TM. Quality Assurance Kit for use with DU.RTM.-6 and DU.RTM.-7 UV-Vis Spectrophotometers", Technical Information, T1544-UV-83-3, Beckman Instruments, Inc., 1983.
Alfa Catalog 1982, pp. 378, 457, Alfa Products, Thiokol/Ventron Division.
Frings, "Calibration and Monitoring . . . ", Clin. Chem., vol. 25, No. 6, 1979.
Frings, "Convenient Method . . . ", Clin. Chem., vol. 22, No. 1, 1976.
Anderson John C.
Kaye Wilbur I.
Sun Lilla S.
Beckman Instruments Inc.
Frieman R. S.
Gron Teddy S.
Kilby Catherine S.
Meads R. R.
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