601. The effect of solvent on the ultra-violet absorption spectra of aromatic hydrocarbons with special reference to the mechanism of salting-out. Part II. Aqueous salt solutions

Author(s):  
E. F. G. Herington ◽  
W. Kynaston

The results of the study of the absorption spectra of a number of complex aromatic hydrocarbons, some of which are of considerable biological importance, were described in a previous paper (Part I).* The present paper contains results of similar experimental investigations, together with an account of quantitative measurements at low temperatures. For general theoretical relationships, nomenclature, and technique at room temperatures, reference should be made to Part I, the results here described being obtained as before with a “ Spekker ” photometer. The only experimental change is the substitution of a transformer for the induction coil outfit previously employed. Purity of Materials With few exceptions, all of the compounds studied were prepared synthetically in this Institute by methods described in the original memoirs to which reference is made. The specimens employed for spectroscopic purposes were the original highly purified analytical samples or else specimens which had been specially prepared and purified for examination.


2017 ◽  
Vol 17 (12) ◽  
pp. 7495-7507
Author(s):  
Shuzo Kutsuna

Abstract. Gas-to-water equilibrium coefficients, KeqS (in M atm−1), of difluoromethane (CH2F2), a hydrofluorocarbon refrigerant (HFC-32), in aqueous salt solutions relevant to seawater were determined over a temperature (T) range from 276 to 313 K and a salinity (S) range up to 51 ‰ by means of an inert-gas stripping method. From the van't Hoff equation, the KeqS value in water, which corresponds to the Henry's law constant (KH), at 298 K was determined to be 0.065 M atm−1. The salinity dependence of KeqS (the salting-out effect), ln(KH∕KeqS), did not obey the Sechenov equation but was proportional to S0. 5. Overall, the KeqS(T) value was expressed by ln(KeqS(T))  =  −49.71 + (77.70 − 0.134  ×  S0. 5)  ×  (100∕T) + 19.14  ×  ln(T∕100). By using this equation in a lower-tropospheric semi-hemisphere (30–90 °S) of the Advanced Global Atmospheric Gases Experiment (AGAGE) 12-box model, we estimated that 1 to 4 % of the atmospheric burden of CH2F2 resided in the ocean mixed layer and that this percentage was at least 4 % in the winter; dissolution of CH2F2 in the ocean may partially influence estimates of CH2F2 emissions from long-term observational data of atmospheric CH2F2 concentrations.


2010 ◽  
Vol 493 (1-3) ◽  
pp. 94-96 ◽  
Author(s):  
Craig P. Schwartz ◽  
Janel S. Uejio ◽  
Andrew M. Duffin ◽  
Walter S. Drisdell ◽  
Jared D. Smith ◽  
...  

1970 ◽  
Vol 3 (1) ◽  
pp. 18-24 ◽  
Author(s):  
KAKUSABURO ONDA ◽  
EIZO SADA ◽  
TAKESHI KOBAYASHI ◽  
SHIGEHARU KITO ◽  
KUNIMITSU ITO

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