Micro method for determination of borohydride with NAD+.

نویسندگان

  • D A Werner
  • C C Huang
  • D Aminoff
چکیده

A spectrophotometric method for the determination of borohydride is described. It involves the reduction of NAD’ to a number of isomeric forms of NADH by borohydride. In the standard assay procedure herewith presented, there is a direct proportionality between the absorption at 340 nm and the amount of borohydride in solution over the range IO-100 nmoles, with an effective “molar extinction coefficient” of 12.2 X IO”. The method is simple, rapid, and sensitive.

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

Design and Evaluation and Synthesis a Starch-Capped Silver NanoParticles Sensor and Determination trace Sulfacetamide Drug in the Presence Sodium borohydride in Blood and Urine Samples with Kinetic Spectrophotometric Method

A new Kinetic Spectrophotometic method for the Determination of trace amount Sulfacetamide Drug into real samples has been described based with silver nanoparticles starch-capped sensor, by sodium borohydride. The reaction is followed spectrophotometrically by measuring the decrease in the absorbance at 347.5 nm. 1.0×10-2 molL-1 silver nanoparticles starch-capped sensor, 2.0×10-3 mol L-1 sodium...

متن کامل

The Electroanalytical Determination of Sodium Borohydride Using a Gold Electrode

Sodium borohydride or sodium tetrahydroborate is used as a reducing agent in many organic and inorganic reactions. Therefore, the determination of sodium borohydride present in the system is of great importance. Borohydride releases hydrogen under appropriated conditions in the presence of a suitable catalyst. Since the amount of hydrogen emitted is proportional to the amount of borohydride, th...

متن کامل

Application of Microfunnel Magnetic Stirring Assisted Liquid-Liquid Micro-extraction Method for Pre-concentration and Determination of Silver Ion in Water Samples

In this research, a highly sensitive, selective, rapid and simple micro-funnel magnetic stirringassisted liquid–liquid microextraction (MF-MSA-LLME) method combined with flame atomic absorption spectrometry (FAAS) was introduced for the preconcentration, extraction, and measurement of trace amounts of silver ion. In this method 1-(2–Pyridylazo)-2-naphthol (PAN) and 1-octanol were used as chelat...

متن کامل

Direct determination of mercury in blood by use of sodium borohydride reduction and atomic absorption spectrophotometry.

A method is presented for the rapid determination of total mercury in blood. The reagent used is alkaline sodium borohydride, and no digestion of the sample is needed. The detection limit and sensitivity are 1.15 and 1.59 ng of Hg, respectively. The method gives reproducible results (the CV ranged from 5.3 to 6.7% for low and high mercury blood samples, respectively), comparable to those obtain...

متن کامل

Reduction of organic mercury in water, urine, and blood by sodium borohydride for direct determination of total mercury content.

We have established the optimal conditions for use of sodium borohydride as the reducing agent before the direct determination of mercury in water, urine, and blood by atomic absorption spectroscopy. We evaluated the effects of pH, temperature, and cupric sulfate concentration on the direct determination of both organic and inorganic compounds of mercury. Accurate and precise quantification of ...

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 biochemistry

دوره 54 2  شماره 

صفحات  -

تاریخ انتشار 1973