1.Temperature dependence of Henry's law constant for hydrogen cyanide. Generation of trace standard gaseous hydrogen cyanide.
Ma J1, Dasgupta PK, Blackledge W, Boss GR. Environ Sci Technol. 2010 Apr 15;44(8):3028-34. doi: 10.1021/es1001192.
Primary data for the temperature dependent solubility of HCN in water do not presently exist for low concentrations of HCN at environmentally or physiologically relevant temperatures. Henry's Law constant (K(H), M/atm) for the vapor-solution equilibrium of HCN was determined in 0.1 M sodium phosphate buffer (adjusted to pH 9.00 +/- 0.03 at 296.6 +/- 0.1 K) from 287-311 K. Stable gas phase concentrations of HCN are generated by established techniques, via air equilibration of aqueous cyanide partitioned by a microporous membrane. The effluent gaseous HCN, in equilibrium with the constant temperature aqueous cyanide, was collected in dilute NaOH and determined by a spectrophotometrically using cobinamide. The K(H) of HCN may be expressed as ln K(H) (M/atm) = (8205.7 +/- 341.9)/T - (25.323 +/- 1.144); r(2) = 0.9914) where T is the absolute temperature in K. This corresponds to 9.02 and 3.00 M/atm at 25 and 37.4 degrees C, respectively, compared to actual measurements of 9.
2.[Preparation of high viscous chitosan/glycerol phosphate and preliminary studies on its properties].
Jing B1, Wang Z, Jia S, Zhang Z, Memg Z. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. 2008 Feb;22(2):178-82.
OBJECTIVE: To increase the viscosity of chitosan/glycerol phosphate (C/GP) and to improve its preparation technique in order to develop the application range of C/GP.
