| http://www.w3.org/ns/prov#value | - There is a need, then, for a method for determining the pH and hydroxide concentrations of solutions, remotely and accurately, especially when thesolutions are hazardous or otherwise inaccessible.SUMMARY OF THE INVENTIONAccording to its major aspects and broadly stated, the present invention is a method for determining remotely the hydroxide content or pH
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