Abstract

Absorption readings of dichromate solution standards were made with 9 Cary-14 spectrophotometers and 16 Cary-11 spectrophotometers. Agreement among instruments was somewhat better than that obtained in previous similar studies with ultraviolet solution standards.

The absorption spectra of two glass filters were determined in the near infrared region with the Cary-14 spectrophotometers. Wavelength and absorbance readings were in excellent agreement.

© 1960 Optical Society of America

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References

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  1. E. Fullerton Cook, chairman, U. S. Pharmacopoeia, Collaborative Spectrophotometric Study (1940).
  2. Ewing and Parsons, Anal. Chem. 20, 423 (1948).
    [CrossRef]
  3. J. R. Edisbury, Photoelect. Spectrometry Group Bull. 1, 10 (1949).
  4. E. F. Hartree, Photoelect. Spectrometry Group Bull. 3, 61 (1950).
  5. N. T. Gridgeman, Photoelect. Spectrometry Group Bull. 4, 67 (1951).
  6. Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).
  7. Brode, Gould, Whitney, and Wyman, J. Opt. Soc. Am. 43, 862 (1953).
    [CrossRef]
  8. J. M. Vandenbelt, J. Opt. Soc. Am. 44, 641 (1954).
    [CrossRef]
  9. Vandenbelt and Spurlock, J. Opt. Soc. Am. 45, 967 (1955).
    [CrossRef] [PubMed]
  10. J. R. Edisbury, Photoelec. Spectrometry Group Bull. 5, 109 (1952).

1955 (2)

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

Vandenbelt and Spurlock, J. Opt. Soc. Am. 45, 967 (1955).
[CrossRef] [PubMed]

1954 (1)

1953 (1)

1952 (1)

J. R. Edisbury, Photoelec. Spectrometry Group Bull. 5, 109 (1952).

1951 (1)

N. T. Gridgeman, Photoelect. Spectrometry Group Bull. 4, 67 (1951).

1950 (1)

E. F. Hartree, Photoelect. Spectrometry Group Bull. 3, 61 (1950).

1949 (1)

J. R. Edisbury, Photoelect. Spectrometry Group Bull. 1, 10 (1949).

1948 (1)

Ewing and Parsons, Anal. Chem. 20, 423 (1948).
[CrossRef]

1940 (1)

E. Fullerton Cook, chairman, U. S. Pharmacopoeia, Collaborative Spectrophotometric Study (1940).

Brinkman,

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

Brode,

Edisbury, J. R.

J. R. Edisbury, Photoelec. Spectrometry Group Bull. 5, 109 (1952).

J. R. Edisbury, Photoelect. Spectrometry Group Bull. 1, 10 (1949).

Ewing,

Ewing and Parsons, Anal. Chem. 20, 423 (1948).
[CrossRef]

Fahrenfort,

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

Fullerton Cook, E.

E. Fullerton Cook, chairman, U. S. Pharmacopoeia, Collaborative Spectrophotometric Study (1940).

Gould,

Gridgeman, N. T.

N. T. Gridgeman, Photoelect. Spectrometry Group Bull. 4, 67 (1951).

Haas,

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

Hartree, E. F.

E. F. Hartree, Photoelect. Spectrometry Group Bull. 3, 61 (1950).

Ketelaar,

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

Parsons,

Ewing and Parsons, Anal. Chem. 20, 423 (1948).
[CrossRef]

Spurlock,

Vandenbelt,

Vandenbelt, J. M.

Whitney,

Wyman,

Anal. Chem. (1)

Ewing and Parsons, Anal. Chem. 20, 423 (1948).
[CrossRef]

J. Opt. Soc. Am. (3)

Photoelec. Spectrometry Group Bull. (1)

J. R. Edisbury, Photoelec. Spectrometry Group Bull. 5, 109 (1952).

Photoelect. Spectrometry Group Bull. (4)

J. R. Edisbury, Photoelect. Spectrometry Group Bull. 1, 10 (1949).

E. F. Hartree, Photoelect. Spectrometry Group Bull. 3, 61 (1950).

N. T. Gridgeman, Photoelect. Spectrometry Group Bull. 4, 67 (1951).

Ketelaar, Fahrenfort, Haas, and Brinkman, Photoelect. Spectrometry Group Bull. 8, 176 (1955).

U. S. Pharmacopoeia, Collaborative Spectrophotometric Study (1)

E. Fullerton Cook, chairman, U. S. Pharmacopoeia, Collaborative Spectrophotometric Study (1940).

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Figures (1)

Fig. 1
Fig. 1

Near infrared absorption spectra of Corning didymium filter No. 5120 and Corning H.R. red purple ultra No. 587.

Tables (7)

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Table I Cary-14 absorbance values of potassium dichromate Solution A (0.006006% in 0.01N H2SO4).

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Table II Cary-14 absorbance values of potassium dichromate Solution B (0.012002% in 0.01N H2SO4).

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Table III Cary-11 absorbance values of potassium dichromate Solution A (0.006006% in 0.01N H2SO4).

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Table IV Cary-11 absorbance values of potassium dichromate Solution B (0.012002% in 0.01N H2SO4).

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Table V Absorptivity (1%, 1 cm) values of potassium dichromate.

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Table VI Cary-14 absorbance values of filter No. 587. Near infrared.

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Table VII Cary-14 absorbance values of filter No. 5120. Near infrared.