Stable Spectrophotometry of Small Density Changes
نویسندگان
چکیده
منابع مشابه
Stable spectrophotometry of small density changes.
Measurement and control circuits for recording small density changes by use of several photo-tube circuits are given. The minimum drift rates obtained are 1 X 10-6 part per minute with a differential photo-tube circuit, 3 X 10-5 part per minute with a single photo-tube circuit, and 4 X 10-4 part per minute with a photo-multiplier circuit. The differential and single photo-tube circuits have bee...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 1947
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1741013