A method for measuring the concentration of creatinine includes the steps of: (A) mixing a sample containing creatinine with a creatinine quantitative reagent including 1-methoxy-5-methylphenazinium in the absence of picric acid and any enzyme responsive to creatinine, to cause the creatinine to reduce...http://www.google.com/patents/US20100105094?utm_source=gb-gplus-sharePatent US20100105094 - METHOD, DEVICE AND APPARATUS FOR MEASURING THE CONCENTRATION OF CREATININE, AND METHOD, DEVICE AND APPARATUS FOR MEASURING THE AMOUNT OF SALT IN URINE USING THE SAME
