a new, simple, rapid, and cheap method for determination of trace amounts of nitrite ion is reported.determination is based on reduction of bromate ion by nitrite ion, in the presence of murexide inacidic media. during reaction of bromate ion with nitrite ion, the reaction mixture is decolorized.the absorbance changes is then monitored spectrophotometricaly at 520 nm, at 25 °c. dynamicrange of ...

In Part I, it expands the initial Phase I work by evaluating the roles of various co-constituents that could be present in drinking water or in stomach fluids to determine their affect on the rates of reaction in simulated gastric juice at low pH and in the presence of chloride and hydrogen sulfide. The issue being investigated was whether bromate could be decomposed to some degree in the stoma...

Spectrophotometric and electrochemical studies were successfully used in quantitative analysis of Amitriptyline Hydrochloride (ATH) and Nortriptyline Hydrochloride (NTH). Conductometric titration were carried out in equeous solution using iodide and dopamine and serotonine as titrant. Two new methods using spectrophotometry are dascribed for the determination of (ATH) and (NTH) with potassium b...

the present work reports a kinetic spectrophotometric method for the determination of traceamounts of sulphite that is based on inhibitory effect of sulphite on the oxidation of methyleneblue (mb) in acidic media. the reaction is followed spectrophotometrically by monitoring thedecrease in absorbance of mb at 664 nm with a fixed time of 0.5-4.5 minutes. it was found thatsulphite exert a strong ...

Investigating the Belousov-Zhabotinskii (BZ) type reaction of an acidic L-ascorbic acid (AA) / potassium bromate / cerous sulfate system, an oscillatory effect of circular dichroism is detectable at A = 300 nm. HPLC analysis of the oscillatory mixture and spectroscopic experi­ ments indicate that this effect is caused by 3,4,5-trihydroxy-2-oxo-L-valeraldehyde (TVA) a C5 oxidation fragment of AA...

As early as 1854 Knop proposed the use of potassium bromate and hyclrobromic acid for the determination of Iodine values and lately again Tolle (J. Pharm. Chem, 1905, 31, 111 and 183) and Mossier (Ph^n. Zeit., 1907) have proposed the use of Bromine from one source or another for the determination of the degree of unsaturation of fats. Mossier uses a mixture of potassium bromate and bromide acid...

A rapid, simple, precise and accurate method is proposed for the determination of ternary mixtures of periodate-iodate-bromate based on their reaction with iodide ion at different pH values. The absorbance was measured at 352 nm. Three sets of reaction conditions were developed. In the first set of conditions, only periodate reacted with iodide, but in the second set the periodate and iodate re...

This study reports a sensitive kinetic spectrophotometric method for the determination of trace amounts of thiocyanate. In acidic solution, Methylene Blue (MB) is oxidized by bromate to form a colorless compound. The reaction is accelerated by trace amounts of thiocyanate and can be followed by measuring the absorbance at 664 nm. The absorbance of the reaction decreased with an increase in the ...

A new, simple, rapid, and cheap method for determination of trace amounts of nitrite ion is reported.Determination is based on reduction of bromate ion by nitrite ion, in the presence of murexide inacidic media. During reaction of bromate ion with nitrite ion, the reaction mixture is decolorized.The absorbance changes is then monitored spectrophotometricaly at 520 nm, at 25 °C. Dynamicrange of ...

Swimming is a physical activity that accessible to people of all ages in four seasons. However, continuous organic and inorganic precursor load disinfectant dosing make pool water chemistry much more complex than other disinfected waters. Carcinogenic bromate compound one the hundreds disinfection by-products water. The occurrence waters depends on content filling water, process, operating para...