5 results about "Amperometric detector" patented technology

The invention discloses a method for determining the content of monosaccharide in seaweed, and belongs to the technical field of biological detection. According to the method, an ion chromatography sugar separation system is adopted, a pulse ampere detector is combined, CarboPac PA20 is used as a sugar analysis column, and the eight monosaccharide components in the seaweed can be detected under the limited extraction and purification method. The method is low in detection limit, good in stability and suitable for measuring the content of free monosaccharide and polysaccharide hydrolyzed monosaccharide in common algae (such as brown algae, green algae and red algae).

The invention discloses an analysis method for determining the content of galactosamine in sulfated polysaccharide based on high-temperature hydrochloric acid hydrolysis and an ion chromatograph method, which comprises the following steps: hydrolyzing a test sample with hydrochloric acid at high temperature to release galactosamine, separating with an ion chromatograph and a sugar analysis column, detecting with a pulsed ampere detector, and determining the content of galactosamine in sulfated polysaccharide according to a galactosamine reference substance. And quantitatively analyzing the content of galactosamine in the test sample. The method disclosed by the invention has the advantages of simplicity, rapidness, accuracy, high efficiency, no need of derivation treatment and the like.

The invention discloses a sucrose purity determination method, which innovatively utilizes an ion chromatography-pulsed ampere detector to determine trace organic impurities, combines a firing residue weighing method to determine inorganic impurities and a Karl Fischer Coulomb method to determine moisture, and calculates the content (purity) of main components according to a mass balance principle. The method has the advantages of simplicity and convenience in operation, reliable result, high sensitivity and the like, can be widely applied to the fields of sucrose quality control and quality evaluation, and has important significance in improving sucrose product quality and promoting development of related industries.

The invention discloses a method for detecting an impurity I in an amikacin sulfate injection, which adopts a sulfonic strong ion exchange chromatographic column and a specific buffer solution for gradient elution, and can realize high-sensitivity detection without an ampere detector. Wherein a chromatographic column adopts a sulfonyl strong cation sodium system exchange column, gradient elution is performed by using a mobile phase, the mobile phase consists of a first buffer solution, a second buffer solution and a regeneration solution, and the first buffer solution is a citrate buffer solution I; the second buffer solution is a citrate buffer solution II; the regeneration liquid is an ethylenediaminetetraacetic acid sodium hydroxide solution. By screening and optimizing chromatographic conditions such as flow velocity, temperature, wavelength and the like, accurate quantitative detection of the impurity is realized. According to systematic methodology verification, the method has the advantages of high specificity, high sensitivity, good precision, high accuracy and the like, and the impurity I in the amikacin sulfate injection can be quantitatively or qualitatively detected, so that the safety of clinical medication of the amikacin sulfate injection is improved.