A simple rapid method for the determination of hydrogen molecule in water is developed.This method is based on the redox reaction of ferric ion and hydrogen molecule in the presence of colloidal platinum.The released ...A simple rapid method for the determination of hydrogen molecule in water is developed.This method is based on the redox reaction of ferric ion and hydrogen molecule in the presence of colloidal platinum.The released ferrous ion was developed with o-phenanthroline and spectrophotometrically measured at 510 nm.The suitable pH condition of redox reaction of ferric ion and hydrogen molecule is pH 2.And 1 mol of molecular hydrogen reduced 2 mol of ferric ion.The molar coefficient for hydrogen molecule is 2.25×10^4 L·mol^-1·cm^-1.The stability of hydrogen water was also discussed.展开更多
A spectrophotometric approach for the detection of non-ionic surfactant (Triton X-100) has been proposed in this paper. This method does not involve extraction of the ion-associate with harmful solvents, but employs a...A spectrophotometric approach for the detection of non-ionic surfactant (Triton X-100) has been proposed in this paper. This method does not involve extraction of the ion-associate with harmful solvents, but employs adhesion of the ion-association of potassium/non-ionic surfactants complex and tetraphenylporphyrin tetrasulfonic acid obtained by vigorous shaking. The adhered ion-associate was dissolved with water and its absorbance was measured. The sensitivity for Triton X-100 was determined to be 0.146 (expressed as absorbance of 1 mg/L solution). The adhesion tendency of ion-associate was found to be dependent on the water contact angle, which in turn was influenced by a high adhesion of the ion-associate and by low blank values. In this respect, a tetrafluo-roethylene vessel was found to be the most suitable for the detection of non-ionic surfactants. This spectrophotometrical method is simply and rapidly performed by a procedure based on mechanical shaking and can be employed to detect non-ionic surfactants containing more than 7 polyethylene oxide units.展开更多
Simple methods for the determination of hydrogen molecule in water are developed. These methods are based on the redox reactions between metal ions such as ferric ion and cupric ion with hydrogen molecule in the prese...Simple methods for the determination of hydrogen molecule in water are developed. These methods are based on the redox reactions between metal ions such as ferric ion and cupric ion with hydrogen molecule in the presence of colloidal platinum. The released ferrous ion was developed with o-phenanthlorine, bathophenanthroline disul fonate and Ferrozine, on the other hand cuprous ion was developed with bathocuproinedisulfonate. In these methods, ferric ion is superior than cupric ion because of its sensitivity and stoichiometric reaction with hydrogen molecule. The hydrogen molecule proved to decompose hydroxy radical released from Fenton reaction by spectrofluorometry.展开更多
文摘A simple rapid method for the determination of hydrogen molecule in water is developed.This method is based on the redox reaction of ferric ion and hydrogen molecule in the presence of colloidal platinum.The released ferrous ion was developed with o-phenanthroline and spectrophotometrically measured at 510 nm.The suitable pH condition of redox reaction of ferric ion and hydrogen molecule is pH 2.And 1 mol of molecular hydrogen reduced 2 mol of ferric ion.The molar coefficient for hydrogen molecule is 2.25×10^4 L·mol^-1·cm^-1.The stability of hydrogen water was also discussed.
文摘A spectrophotometric approach for the detection of non-ionic surfactant (Triton X-100) has been proposed in this paper. This method does not involve extraction of the ion-associate with harmful solvents, but employs adhesion of the ion-association of potassium/non-ionic surfactants complex and tetraphenylporphyrin tetrasulfonic acid obtained by vigorous shaking. The adhered ion-associate was dissolved with water and its absorbance was measured. The sensitivity for Triton X-100 was determined to be 0.146 (expressed as absorbance of 1 mg/L solution). The adhesion tendency of ion-associate was found to be dependent on the water contact angle, which in turn was influenced by a high adhesion of the ion-associate and by low blank values. In this respect, a tetrafluo-roethylene vessel was found to be the most suitable for the detection of non-ionic surfactants. This spectrophotometrical method is simply and rapidly performed by a procedure based on mechanical shaking and can be employed to detect non-ionic surfactants containing more than 7 polyethylene oxide units.
文摘Simple methods for the determination of hydrogen molecule in water are developed. These methods are based on the redox reactions between metal ions such as ferric ion and cupric ion with hydrogen molecule in the presence of colloidal platinum. The released ferrous ion was developed with o-phenanthlorine, bathophenanthroline disul fonate and Ferrozine, on the other hand cuprous ion was developed with bathocuproinedisulfonate. In these methods, ferric ion is superior than cupric ion because of its sensitivity and stoichiometric reaction with hydrogen molecule. The hydrogen molecule proved to decompose hydroxy radical released from Fenton reaction by spectrofluorometry.
