The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 1984
Filed:
Dec. 15, 1981
Lilla S Sun, Seal Beach, CA (US);
John C Anderson, Burbank, CA (US);
Beckman Instruments, Inc., Fullerton, CA (US);
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.