| 摘要 |
<p>Novel quaternary ammonium polyelectrolyte salts which are useful in the preparation of test means and test devices for measuring the ionic strength or specific gravity of an aqueous test sample are disclosed. The salts comprise a weakly acidic polyelectrolyte polymer wherein at least one of the carboxyl groups of the polymer is in the form of the salt of a quaternary ammonium ion having the structure <CHEM> in which the R substituents, same or different, are hydrogen lower alkyl or aryl, and at least one of R is other than hydrogen.</p> |
