An inexpensive and fast vanadium [(IV), (V)] speciation method was performed by using optical chemical sensor that incorporates lipophilized calmagite (Cal) with cetyl pyridinium chloride (CPC) as a suitable ligand on triacetylcellulose membrane in aqueous solutions prior to UV-Vis spectrometric determination. Absorbance decrease of the optode in pH 6 at 490 nm depended on the V(V) ion concentr...

an extraction-spectrophotometric method for the determination of trace amounts of ammonium ion is described. ammonium ion is effectively extracted as a neutral ternary complex nh . db 18c6. calmagite at ph 3.0 into chloroform, followed by spectrophotometric determination at =48 5 nm. molar absorptivity of the ternary complex at this wavelength is 1.08 10 mol cm . beer's law is obeyed over ...

a simple and sensitive extraction-spectrophotometric method for rapid and accurate determination of benzocaine in pure and dosage forms was developed. benzocaine was effectively extracted as a 1:1 ion pair complex with dicyclohexyl-18-crown-6 and calmagite in acidic media into chloroform, followed by spectrophotometric determination at 486 nm. molar absorptivity of the ternary complex at this w...

The valorization of natural polymeric substrates has increased due to their uses and applications in several fields. existence many functional groups chemical structures allows them be easily subjected modifications. This work focuses on the exploration a new low-cost abundant cellulosic biomass, Zilla spinosa fruit. biomaterial was functionnalized with polyethyleneimine (1%, 3%, 5%, 8%) order ...

We describe an automated method for magnesium assay, for use with the Cobas-Bio centrifugal analyzer. Magnesium is reacted with calmagite, a dye, and the absorbance of the magnesium-dye complex at 520 nm is measured. EDTA is then added to break up the complex and the absorbance at 520 nm is re-measured to correct for sample color and turbidity. Including ethylene glycol bis(beta-aminoethyl ethe...

We report a method for assaying magnesium in serum and urine involving only one enzyme, isocitrate dehydrogenase (NADP+)(EC 1.1.1.42), which requires magnesium ion for activity. The enzymatic reduction of NADP+ by isocitrate increases in rate linearly up to at least 20 mmol/L magnesium in the presence of appropriate concentrations of the two metal-chelating reagents, EDTA and glycol ether diami...

Previous studies have assessed the protective effect of nebulized magnesium sulphate on bronchial hyperreactivity. This study investigated the effect of histamine challenge on intracellular (erythrocytes) and extracellular (plasma) levels of magnesium and the possible relationship between degree of bronchial hyperreactivity and levels of Mg in plasma and erythrocytes. The authors studied 42 mil...

The dairy industry is considered one of the main industries not only in Iraq particular but throughout world. Different treatment methods have been used over time and different countries. Here, membrane distillation has to treat wastewater generated by this reduce burden on environment. In paper, direct was remove nitrates from discharged plants. This method easy operate, manage, many economic ...

Background: There is a lack of information regarding serum uric acid (SUA) and magnesium levels among the pre-diabetics population. This study aimed to assess biochemical assessment both in prediabetics Peshawar-KP region. Methodology: In this case-control study, patients having normal glucose were considered as control, cases. Fasting blood (FPG) between 100-125 mg/dl or HbA1c 5.7 6.4% pre-dia...