Development and certification of an automated differential titration photocalorimeter

Авторы публикации: 
Gubarev, Y. A., Lebedeva, N. S., V’yugin, A. I., & Golubev, S. N.
Russian Journal of Physical Chemistry A
Год публикации: 
89(4)/ 724-728

An automated differential titration photocalorimeter (ADTPC) has been designed for investigating
photoinduced  processes.  This  instrument  provides  means  to  record  thermal  and  spectral  (absorbance)
changes in a calorimetric cell. Metrological characteristics of the described ADTPC are detection limit,
0.001 J with a reproducibility of 0.0002 J or better; short-duration noise level, ±5 rel. units; long-duration
noise level, ±29 rel. units. ADTPC has been certified against the heats of mixing of solvents and the heat of
neutralization reaction between tris(hydroxymethyl)aminomethane and HCl. The photocalorimetric unit of
the device has additionally been certified against the heat of photolysis of K3[Fe(C2O4)3] and the heat of
isomerization of azobenzene in heptane. Within the claimed errors, the heats measured with ADTPC are in
agreement with the values recommended for the above systems.

Губарев Юрий Александрович