Sage Journals: Discover world-class research

Abstract

A system for truly remote near-infrared (NIR) analysis of multiple process streams is described. The system utilizes a standard laboratory Fourier transform (FT) NIR spectrophotometer, housed remotely from the plant in a safe area. NIR radiation is transmitted between the spectrophotometer and the process stream by a pair of multimode silica optical fibers and an optical multiplexer. The qualitative and quantitative performance of the system, over the 1- to 2-μm region, is demonstrated with total optical fiber lengths of 2 km. The results of an analysis of a set of aliphatic alcohol mixtures, using the process analysis system, are compared with those obtained with a normal laboratory instrument.

Keywords

Near-infrared Fiber optics Remote process analysis

Get full access to this article

View all access options for this article.

References

Osborne

B. G.

and Fearn

, Near Infrared Spectroscopy in Food Analysis (Longman Scientific & Technical, Harlow, Essex, 1986), Chap. 7.

Buchanan

B. R.

and Honigs

D. E

, Appl. Spectrosc. 41, 1388 (1987).

Weyer

L. G.

Becker

K. J.

and Leach

H. B

, Appl. Spectrosc. 41, 786 (1987).

Landa

, Rev. Sci. Instrum. 50, 34 (1979).

Bruce

S. H.

and Turnbull

, “Process NIR Analysis,” in Analytical Applications of Spectroscopy, Creaser

CS.

and Davies

A.M.C

, Eds. (Royal Society of Chemistry, London, 1988).

Callis

J. B.

Illman

D. L.

and Kowalski

B. R

, Anal. Chem. 59, 624A (1987).

Archibald

D. D.

Miller

C. E.

Lin

L. T.

and Honigs

D. E

, Appl. Spectrosc. 42, 1549 (1988).

Sarhangi

and Thompson

D. A

, Chemical Vapor Deposition of Fluoride Glasses, Technical Report TR-62 (Corning Glass Works, Corning, New York, 1987).

France

P. W.

Carter

S. F.

Moore

M. W.

and Day

C. R

, British Telecom. J. 5, No. 2 (1987).

10.

Compton

D. A. C.

Hill

S. L.

Wright

N. A.

Piche

and Stevenson

W. A

, Appl. Spectrosc. 42, 972 (1988).

11.

Johnson

, Fibre Optic Switching, Photonics Spectra 24, No. 5 (Laurin Publishing Company, Pittsfield, Massachusetts, 1990).

12.

Fredericks

P. M.

Lee

J. B.

Osborn

P. R.

and Swinkels

D. A. J

, Appl. Spectrosc. 39, 303 (1985).

13.

Fredericks

P. M.

Lee

J. B.

Osborn

P. R.

and Swinkels

D. A. J

, Appl. Spectrosc. 39, 311 (1985).

14.

Determination of Alcohols in Mixtures Using Fibre Optic Spectroscopy and Partial Least Squares (PLS) Regression, Application Note A4–188 (Guided Wave, Inc., El Dorado Hills, California).

15.

Deming

S. N.

and Morgan

S. L

, Experiment Design: A Chemometric Approach (Elsevier, Amsterdam, 1987).