Characteristic redox potential-time curve in the iron(II)/nitric acid autocatalytic reaction and its application to a time measurement-determination of folic acid.

نویسندگان

  • Jun Kato
  • Shukuro Igarashi
چکیده

A characteristic redox potential-time curve of the iron(II)/nitric acid autocatalytic reaction was applied to a time measurement-determination for sub-microM levels of folic acid. The determination range was 7.5 x 10(-7) - 1.5 x 10(-5) M, the detection limit (3 sigma) was 5.9 x 10(-7) M, and the relative standard deviation was 3.6% (n = 5).

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Trace Amounts Determination of Vanadium (V) Using a New Kinetic-Catalytic Reaction System

This study describes a new simple, sensitive and selective catalytic kinetic spectrophotometricmethod for the determination of vanadium (V). The method is based upon the catalytic effect ofvanadium (V) on the oxidation of Carminic acid by bromate in sulfuric acid media. The reaction wasfollowed spectrophotometrically by measuring the decrease in absorbance at 490 nm and thedependence of sensiti...

متن کامل

Effect of foliar application of iron nano-chelate and folic acid on seed yield and some physiological traits of sesame cultivars under drought tension conditions

Drought tension and iron fertilizer play an important role in determining the grain yield and quality of oil seed products. Therefore, a split plot-factorial experiment based on randomized complete blocks design with three replications was conducted to investigate the effect of foliar application of iron nano-chelate and folic acid on some quantitative and qualitative traits of two sesame culti...

متن کامل

Efficiency of Folic Acid in Improving Yield and Fruit Quality of Strawberry

In this research the effect of application of different levels of folic acid and time on some quality and agronomic characteristics of strawberry (cultivar Paros) was investigated. The plants were treated by folic acid with concentrations of 0, 20 and 40 mM at two stages (30 days after planting and first blooming) as a factorial experiment using a randomized complete block design with four repl...

متن کامل

Application of the 1,2-Dihydroxybenzene-3,5-Disulfonic Acid for Separation and Preconcentration of Trace Iron and Determination by Eight Order Derivative Spectrophotometry

Iron is quantitatively retained on an adsorbent made by coprecipitation of 1,2-dihydroxybenzene-3,5-disulfonic acid (Tiron) and tetradecyldimethylbenzylammonium choride (TDBA) an microcrystalline naphthalene as a slurry or packed in a column, in the pH range 6.0-9.0 from a large volumes of aqueous solutions (up to 200 ml on microcrystalline naphthalene and up to 500 ml of aqueous solutions ...

متن کامل

Adsorption Properties of Folic Acid onto Functionalized Carbon Nanotubes: Isotherms and Thermodynamics Studies

In the present research, we report the results of a systematic study on the adsorption properties of folic acid (FA) over functionalized single-walled carbon nanotubes (SWCNTs) using the various factors, such as adsorbent dose, contact time, temperature, and initial FA concentration. Our results reveal that SWCNT is an excellent adsorbent for folic acid, with an adsorption percentage of up to 7...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

دوره 24 3  شماره 

صفحات  -

تاریخ انتشار 2008