The monomers [2-(acryloyloxy)ethyl]trimethylammonium chloride (ClAETA) and [2-(acryloyloxy)ethyl]trimethylammonium methyl sulfate (SAETA) were used as received (Aldrich).
0% for the filtration fraction of poly[2-(acryloyloxy)ethyl]trimethylammonium chloride (P(ClAETA)) and poly[2-acryloyloxy)ethyl]trimethylammonium methyl sulfate (P(SAETA)), respectively.
Then the excess of anions that did not exchange with methyl sulfate was removed by washing with water of adjusted pH.
anions, in comparison to the methyl sulfate anions, associated with the quaternary ammonium groups.
Figure 4 shows the results obtained with the P(SAETA), which contains methyl sulfate anions instead of chloride anions as exchanger groups.
The effect of the exchange of methyl sulfate anions with S[O.
Moreover, the exchange in the polymeric structure of the methyl sulfate species by the sulfate anions turned out to be difficult.
4] addition induced a change in polarization, without exchange of the methyl sulfate species for divalent sulfate anions, decreasing the cationic exchange ability for arsenate ion retention.
They then exposed the resulting first generation (F1) seeds to a chemical mutagen, ethyl methyl sulfate
, and grew the seeds on to produce an F2 generation.