Convenient Fiber-Optic-Based Sample Cell for Shpol'skii and Low-Temperature Phosphorescence Spectrometry

1989 ◽  
Vol 43 (3) ◽  
pp. 422-425 ◽  
Author(s):  
Richard T. Madison ◽  
Mary K. Carroll ◽  
Gary M. Hieftje
Keyword(s):  
Low Temperature ◽  
Fiber Optic ◽  
Dynamic Range ◽  
Detection Limits ◽  
Linear Dynamic Range ◽  
Sample Cell ◽  
Linear Dynamic ◽  
Light Guides

A sample cell for observing the Shpol'skii effect at 77 K is described and analytically assessed. The cell employs fiber-optic light guides to transport excitation and emission radiation. The system is compact, inexpensive, and simple to construct from commercially available laboratory components, and it alleviates several problems inherent in conventional refrigerated-cell designs. Detection limits for anthracene, coronene, and pyrene obtained with the sample cell are 8.8 × 10−8 M, 8.4 × 10−7 M, and 3.5 × 10−7 M, respectively. The linear dynamic range for each compound is 2 to 3 orders of magnitude.

Pentafluorobenzylation Derivatization for Determination of Chlorinated Herbicide Acids

1987 ◽  
Vol 70 (5) ◽  
pp. 889-891
Author(s):  
Donald F Gurka ◽  
Fred L Shore ◽  
Shu-Teh Pan
Keyword(s):  
Gas Chromatography ◽  
Dynamic Range ◽  
Methyl Esters ◽  
Detection Limits ◽  
Relative Importance ◽  
Linear Dynamic Range ◽  
Linear Dynamic ◽  
Dynamic Concentration ◽  
Better Than

Abstract Pentafluorobenzyl and methyl esterification methods for several common herbicide acids have been evaluated and compared. Gas chromatography,' electron capture instrumental detection limits for 2 of 7 pentafluorobenzyl esters were better than the corresponding methyl esters, and comparable for the other S herbicide esters. The linear dynamic concentration range was generally wider for the methyl esters. Gas chromatography of some pentafluorobenzyl derivatives was complicated by coelution of certain derivatives with each other and with byproducts of the derivatization reaction. The ruggednessoptimized pentafluorobenzylation procedure was subjected to linear dynamic range and detection limit studies. The choice between methyl or pentafluorobenzyl esters is contingent on the relative importance of detection limits and linear dynamic range

New Fiber-Optic-Based Instrumentation for the Measurement of Low-Temperature Phosphorescence Intensities and Lifetimes

1992 ◽  
Vol 46 (1) ◽  
pp. 126-130 ◽  
Author(s):  
Mary K. Carroll ◽  
Gary M. Hieftje
Keyword(s):  
Steady State ◽  
Low Temperature ◽  
Glass Formation ◽  
Fiber Optic ◽  
Detection Limits ◽  
Sample Cell ◽  
Phosphorescence Lifetime ◽  
Conventional Instrumentation

New fiber-optic instrumentation for phosphorescence-lifetime determinations and for steady-state phosphorescence measurements is shown to perform comparably to conventional instrumentation. The importance of optimal glass formation in the fiber-optic sample cell is considered in some detail. Detection limits for acetophenone, benzophenone, and p-nitrophenol are reported, and phosphorescence lifetimes are measured for several compounds, with values ranging from 2.5 ms to 4.7 s.

A Graphene-Enhanced Fiber-Optic Phase Modulator With Large Linear Dynamic Range

2014 ◽  
Vol 26 (18) ◽  
pp. 1867-1870 ◽  
Author(s):  
Feng Zhou ◽  
Ran Hao ◽  
Xiao-Feng Jin ◽  
Xian-Min Zhang ◽  
Er-Ping Li
Keyword(s):  
Fiber Optic ◽  
Dynamic Range ◽  
Phase Modulator ◽  
Linear Dynamic Range ◽  
Linear Dynamic

scholarly journals Single particle inductively coupled plasma mass spectrometry: investigating nonlinear response observed in pulse counting mode and extending the linear dynamic range by compensating for dead time related count losses on a microsecond timescale

2020 ◽  
Vol 35 (1) ◽  
pp. 84-99 ◽  
Author(s):  
Ingo Strenge ◽  
Carsten Engelhard
Keyword(s):  
Inductively Coupled Plasma ◽  
Nonlinear Response ◽  
Dynamic Range ◽  
Dead Time ◽  
Linear Dynamic Range ◽  
Pulse Counting ◽  
Inductively Coupled ◽  
Linear Dynamic ◽  
Order Of Magnitude ◽  
Plasma Mass Spectrometry

Sampling of the pulse-counting signal with μs time-resolution provided a functional compensation for dead-time related count losses in spICP-MS, ultimately improving the linear dynamic range by one order of magnitude towards higher count rates.

Sign in / Sign up

Export Citation Format

Share Document