4 results about "Induction time" patented technology

A method for distinguishing metal ions Fe 2+ and Ni 2+ , the method applies a "urease-CO(NH2)2-H2SO4" pH clock reaction system as a distinguishing solution, according to the different induction time generated by metal ions Fe 2+ and Ni 2+ in the pH clock system, so as to realize the qualitative analysis of Fe 2+ and Ni 2+ . The qualitative analysis method of Fe 2+ and Ni 2+ involved in the present application has the characteristics of high accuracy, easy operation and convenience.

The polyethylene of the present invention is characterized in that it has an oxidation induction time of 10 minutes or more at a temperature of 210 to 230°C as measured by a rotational rheometer, and there is a peak corresponding to polypropylene when measured by NMR.

The present invention is a method for quantitatively detecting 2,3,6-trimethylphenol, which uses "NaClO2-C4H 13 A chlorite-ammonium-tetrathionate clock (CAT clock) reaction system using "NO (tetramethylammonium hydroxide)-Na2S4O6" as a substrate is used as a detection solution. The quantitative analysis of 2,3,6-trimethylphenol is achieved based on the different responses of the system to different concentrations of 2,3,6-trimethylphenol, namely, different induction times. The quantitative analysis method for 2,3,6-trimethylphenol involved in the present invention has the characteristics of high accuracy, easy operation, convenience and speed.

The invention relates to a method for quantitatively detecting L-tartaric acid, which is characterized in that a Na2SO3-NaBrO3-K4Fe (CN) 6-H2SO4 clock system, namely a BSF clock reaction system is used as a detection solution, and L-tartaric acid with different concentrations is quantitatively detected according to different responses, namely different induction times, of the system to the L-tartaric acid with different concentrations. The induction time difference delta t is also different (delta t is equal to the induction time of the clock system without adding the L-tartaric acid solution minus the induction time of the clock system after adding the L-tartaric acid solution), and quantitative analysis of the L-tartaric acid is realized. The quantitative analysis method for the L-tartaric acid has the characteristics of high accuracy, easiness in operation, convenience, rapidness and the like.