The degree of substitution (DS) of acylated chitosans was determined by acid-base titration
in order to correlate the structural modification to the thermal behaviors in thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and viscosity.
An electrolysis cell was used to measure the volume of O2(g) and monitor an acid-base titration
The official method for AV measurement is based on the acid-base titration
techniques in nonaqueous solvents.
The degree of deacetylation of chitosan samples was determined by acid-base titration
was also used to check carbonate contamination of the sodium hydroxide titrant solution using the Gran method .
Table 1: Traditional textbook approach to calculations for an acid-base titration
, corresponding to the first half of example 1.
Calcium was defined by method of flame photometry (Pokrovskiy, 1969); inorganic phosphorus--by colorimetrical method (Pokrovskiy, 1969); magnesium--by complexometric method; urine PH index, buffer base shift [BE], standard buffer system [SB], and ammonia in urine were defined using Conway method (Pokrovskiy, 1969); acid-base titration
and pH were defined by potentiometric titration (Toderov, 1966), content of urine acid--by spectrophotometer (Menshikov, 1987), urine oxalate (Sivarinovskiy, 1969).
Laboratory modules were written for gas laws, thermodynamics, and acid-base titration
. These modules have been used this year in the high school chemistry curriculum in the UAB In-Service Area with a great deal of success.
The acid-base titration
curves for styrene-maleic anhydride polymers gave the first indications that it should be possible to form amic acid derivatives of these resins.
Another interesting interpretation of the graph came from the student in User Focus Group 2, who interpreted the graph as representing a reaction of an acid and an externally added base, such as the situation for an acid-base titration
. This EMOC user discussed areas C and D on the graph:
Alternatively, the acidity can be characterized by the acid-base titration
test using NaOH (Kumagai et al., 1978).
The proper choice of indicators was a difficult problem that could be resolved only with a clear understanding of the significance of acid-base titration
curves and the effect upon them of various buffers.