A PHOTOMETER FOR THE MEASUREMENT OF ELASTICALLY SCATTERED-LIGHT FROM MACROMOLECULES IN SOLUTION

被引：3
|
作者：
BOLLE, G [1 ]
CODASTEFANO, P [1 ]
PARADOSSI, G [1 ]
机构：
[1] UNIV ROMA TOR VERGATA,DIPARTIMENTO SCI & TECNOL CHIM,I-00173 ROME,ITALY
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1994年 / 43卷 / 04期
关键词：
D O I：
10.1109/19.310168
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper a description of a low-cost and compact light scattering photometer with a precision temperature control is provided. The instrument can span an angular range from 10 to 160 degrees by means of step-motor driven acquisition optics, and the signal is brought to a single photon counter by means of an optical fiber. The high sensitivity of the system allows measurements of light scattered from dilute polymer solutions with a temperature control with a stability of 0.01-degrees-C and a tolerance less than 0.03-degrees-C. The performances of the photometer were checked on different macromolecular systems in aqueous solution as well as in organic solvents. The results obtained with this instrument are reproducible within 4-1% in the measurements of the light scattered by pure liquids and within +/-2% for macromolecular solutions regardless of the type of solvent used.
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页码：553 / 557
页数：5
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