DOI: 10.1021/es60111a007. Publication Date: December 1975. ACS Legacy Archive. Cite this:Environ. Sci. Technol. 1975, 9, 13, 1157-1163. Note: In lieu of an ...
Frank M. Black* and Larry E. High. Environmental Protection ... to sample oxygen level. Fontijn and Ellison recently developed a gas-phase chemilumines-.
Manual"; Radio Shack: Ft. Worth, TX, 1980. (13) Titus, J. A. "TRS-80Interfacing"; Howard W. Sams & Co., Inc.: In- dianapolis, IN, 1979; Book 1, Chapters 1-3.
Chemiluminescence. Alan J. Hills,*,â Donald H. Lenschow,â and John W. Birksâ¡ ... University of Colorado, Boulder, Colorado 80309-0215. We have developed ...
May 15, 1990 - Brexit reality hits U.K. chemical companies. The U.K.'s pharmaceutical and chemical sectors say they are increasingly concerned about lack of progress... POLICY CONCENTRATES ...
Mesoscale and Microscale Meteorology Division, National Center for Atmospheric Research, Boulder, Colorado 80307-3000, and Department of Chemistry and ...
measurements in air or from samples with ppblevel concen- trations at atmospheric pressure. To our knowledge, none of the methods currently in use combines ...
The measurement of ppb (by volume) levels of Ni(CO)4 in air has been ... spectra, and the effects of flow, pressure, and interference have resulted In a portable ...
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Chemiluminescence of Tetramethyl-1,2-dioxetane. Measurement of Activation Parameters and Rates of Exceedingly Slow Reactions by a Simple and “Nondestructive” Method. Demonstration of Indistinguishable Activation Energies for Generation of Acetone Singlets and Triplets
Sir: Standard procedures for the measurement of rate constants and activation energies of unimolecular reactions’ generally involve following the change of concentration of reactant or product with time. For example, the kinetics of thermal decomposition of tetramethyl-l,2-dioxetane (1) into two molecules of acetone (eq 1) has been studied by following both the disap0-0
I 1 I 1
CHs-C--C--CHs
ki
+2(CH&(3=0
(1)
Hac CH3 1
pearance of 1 (nmr and uv analysis) and the appearance of acetone2 (nmr analysis). Most standard methods3 are relatively imprecise for small conversions (
