Publication Date:
2019-06-28
Description:
High noise levels and oversensitivity of helium detector make flame-ionization and thermal-conductivity detectors more suitable for chromotography. Deficiencies are eliminated by modifying helium device to operate in saturation rather than multiplication mode. Result is low background current, low noise, high stability, and high sensitivity. Detector analyzes halocarbons, hydrocarbons, hydrogen cyanide, ammonia, and inorganics without requiring expensive research-grade helium.
Keywords:
MATERIALS
Type:
MSC-18835
,
NASA Tech Briefs (ISSN 0145-319X); 5; 4; P. 448
Format:
text