Jaffe reaction
... that the Jaffe reaction is still widely employed as the method of choice for creatinine testing, despite not being specific to creatinine?
... that the <b id="mwB-0"><a href="./Jaffe_reaction" id="mwB-4" rel="mw:WikiLink" title="Jaffe reaction">Jaffe reaction</a></b> is still widely employed as the method of choice for <a href="./Creatinine" id="mwB-8" rel="mw:WikiLink" title="Creatinine">creatinine</a> testing, despite not being specific to creatinine?