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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 38,
  • Issue 6,
  • pp. 813-816
  • (1984)

Optimization of GC/FT-IR Measurements I: Construction of Light-Pipes

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Abstract

Conditions under which light-pipes with highly reproducible transmittance are prepared are described. Preparation of borosilicate glass tubing by washing with HF and SiCl<sub>2</sub> solutions gave the best results. Electron microscopy showed that drawn capillary tubing had a much smoother bore than "precision-bore" (drilled) tubing, and light-pipes constructed from drawn tubing had a much higher transmittance. Annealing the tubes at 800°C appeared to cause the gold coating to be more tightly held to the glass tubing. Light-pipes which had been annealed at 800°C could have small holes drilled through the tube without the gold coating lifting.

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