TH15531C3 - - Google Patents

Abstract

------ 04/01/2019 ------ (OCR) page 1 of number 1 page invention summary. The system for the electrochemical determination of salicylic substances in food with differential pulse voltammetry technique consists of a screen-printed probe which is a bipolar electrode. It consists of a carbon-active electrode and a silver / silver chloride reference electrode (Ag / AgCl), a chemical used to control the change in pH and base during the salicylation measurement. The sample to be measured was Briston-Robinson buffer solution concentrated 0.4 molar pH 2.0-11.0.The electrolyte solution used for measurement was salt solution of 0.01-0.1 concentration. The molar condition used in electrochemical measurements with differential pulse voltammetry is the potential change rate of 0.02 V interval time. (interval time) 0.7 s and modulation amplitude of 0.15 volts at 0.4 -1.5 volt potential range ------------ ---- --- 20/07/2018 ------ (OCR) Page 1 of 1 page, Invention Summary. System for the electrochemical determination of salicylic substances in food with differential technique The pulse voltmeter consists of a screen printing probe which is a bipolar electrode that It consists of a carbon-active electrode and a silver / silver chloride-based electrode (Ag / AgCl), a chemical used to control the change in pH and base between Measuring salicylic from the sample to be measured is Briston-Robinson concentrated 0.4 molar pH 2.0-11.0 buffer solution. The electrolyte solution used in the measurement is a salt solution of 0.01-0.1 molar concentration, the conditions used in electrochemical measurements with differential pulse voltages. Mmmetry is the potential change rate of 0.02 volts, interval time of 0.7 s, and modulation amplitude of 0.15 volts at the voltage range. 0.4 -1.5 Volts ------------ ------ 20/10/2017 ------ (OCR) Page 1 of Quantity 1 Page Invention Summary Salicylic substances are useful in inhibiting the growth of microorganisms. Therefore found contamination Of these substances in foods such as pickled fruits and vegetables on an ongoing basis This invention revealed the system For the electrochemical determination of salicylic substances in food, detection methods And tools or Equipment for such measurements With easy sample preparation and measurement processes Convenient for users Professionals are required, but still high accuracy and precision. Systems for the measurement of sali The silicic in food electrochemical method of differential pulse voltammetry is composed of a screen-printed probe, a bipolar electrode composed of a carbon-active electrode. and The reference electrode is made from silver / silver chloride (Ag / AgCl), a control chemical. The pH and base were changed during the measurement of salicylic substances from the sample to be measured, namely Briston-Robinson concentrated buffer solution 0.4 molar pH 2.0 -11.0 electro solution. The light used in the measurements was a salt solution of 0.01-0.1 molar concentration. The condition used in electrochemical measurements with differential pulse voltammetry was the rate. Potential change at 0.02 volts, interval time 0.7 s, and modulation amplitude of 0.15 volts at 0.4 -1.5 volts potential range. ------------

Claims (7)

Disclaimer (all) which will not appear on the advertisement page. : ------ 04/01/2019 ------ (OCR) Page 1 of 2 pages. Disclaimer 1. The electrochemical method for the determination of salicylic substances in foodstuffs consists of: A. Power supply (1) converts 220 volts AC electricity to 12 volts and 5 volts direct current for supply to other equipment inside the machine b. Electrical control and measurement section The response of electric current (2) controls the electrochemical cell system. With differential pulse voltmeter technique And measure the electric current arising from the oxidation of salicylic It consists of a * chemical - electrical control unit. (electrochemical control) model STU-250 EC (STU-250 EC) (3) which controls the distribution of electricity. It is supplied as pulses at the electrode at the interval time 0.7 s, modulation amplitude of 0.15 volts, at the potential range 0.125. Volts and is connected to * (4) screen printing probe, which is a bipolar probe. Containing - Carbon (5) working electrodes, which are reactive electrodes. Measured salicylic oxidation - Silver / silver chloride (Ag / AgCl) reference electrode (6) is responsible for regulating the electrode potential to be constant. The signal processing and analysis section (7) receives the current data from the electrical control and measures the response of the electric current (2) to perform the analysis against the equation entered into the device to calculate the amount of substance. Salicylic contaminants in the sample Then show the results on the screen in milligrams per kilogram. D. Part of the chemicals used in the system. Where a chemical reagent is used to prepare a dropper mixture on a screen printed probe (4) for the determination of salicylic compounds, consisting of - a chemical used to extract salicylic compounds. Silic From the sample to be measured It is a chemical used to control the change in pH and base during the measurement of salicylic substances from the sample to be measured. In this invention, a Briston-Robinson buffer solution concentrated 0.4 molar pH 2.0 - 11.0 and a suitable pH to extraction at pH 2.0 by a page 2 ratio of 2 food samples. The appropriate Briston-Robinson buffer solution is 1: 15-1: 20, or the most suitable 1:20 electrolyte solution. Used in mixing with the sample to be measured in fabrication, this is a salt solution. Which can be selected from Potassium chloride solution, sodium chloride The optimum concentration of 0.01-0.1 molar and electrolyte solution is 0.05 molar sodium chloride. The special characteristics are Chemical-Electrical Control Unit (electrochemical control) Model STU-250 EC (STU-250 EC) 3, which controls the power distribution. The condition used for electrochemical measurements with differential pulse voltammetry is the potential change rate of 0.02 volts at the interval time (interval time). 0.7 s and modulation amplitude 0.15 volts at 0.4 -1.5 volts potential range ------------ ------ 20 / 07/2018 ------ (OCR) Page 1 of 3 pages. Claims 1. System for electrochemical determination of salicylic acid in food, inspection methods and instruments or equipment for The measurements consisted of: a. Power supply 1, which converts 220 volt AC power to 12 volt and 5 volt direct current to supply to other equipment inside the machine; b. Control the electricity and measure the response of the electric current 2 control the system of Electrochemical cells With differential pulse voltmeter technique And measure the current that occurs from the Salicylic oxidation reaction It consists of a * chemical - electrical control unit. (electrochemical control) Model STU-250 EC (STU-250 EC) 3, which controls the power distribution. It is supplied as pulses at the electrode at the interval time 0.7 s, modulation amplitude of 0.15 volts, at the potential range 0.125. Volts and is connected to a * 4 screen printing probe, a bipolar probe. Consisting of - a carbon-active electrode 5, which is a reactive electrode. Measured salicylic oxidation - reference electrode made of silver / silver chlorite (Ag / AgCl) 6 is responsible for keeping the electrode potential constant. C. Processing section. And analyzing the signal 7 serves to receive current data from the control Electricity and measure the response of electric current 2 for analysis with respect to the equation entered into A device to calculate the amount of salicylic contaminants in the sample. And display the results on the screen in Milligram per kilogram With special characteristics Chemical-Electrical Control Unit (electrochemical control) Model STU-250 EC (STU-250 EC) 3, which controls the power distribution. Conditions used in electrochemical measurements With a differential pulse, voltammetric is the potential change rate of 0.02 volts at the interval time of 0.7 s and amplitude modulation. Jude (modulation amplitude) 0.15 volts at the electric potential range 0.4-1.5 volts. Page 2 of the number 3 pages 2. System for the electrochemical determination of salicylic substances in food, detection methods and Tools or equipment for such measurements According to claim 1, which has the following procedures * Prepare food samples to measure salicylic substances * Measured salicylic with 4 screen printing nozzle * Chemical-electrical control unit (electrochemical control) Model STU-250 EC (STU-250 EC) 3 generates an electric current signal of differential pulse voltammetric technique. According to the set parameters And read the electrochemical signals that cause oxidation and reduce noise. * Signal Processing and Analysis Section 7 records the signal and sends it to display it on the Screen in the form of salicylic content in ppm. And can be adjusted to display results in vol. Trammogram And adjusted to select the oxidation peak height and calculate to translate the results to Salicylic concentration on the screen The display and command input (Human interface and controller) is a touch screen. Contains the command buttons to measure. And the measurement display. 3. System for the measurement of salicylic in food by electrochemical method, inspection method and instrument or equipment for such measurement. According to claim 1, where the chemicals used in the control Changes in the pH and base during the measurement of salicylic substances from the The measurement required is Briston-Robinson concentrated 0.4 molar buffer solution with suitable pH. For extraction at pH 2.0 4. System for electrochemical determination of chalicylic in food, inspection method and apparatus or equipment for such measurement. According to claim 1, where the electrolyte solution used The most suitable measurement was 0.05 m of sodium chloride concentration. 5. Electrochemical methods for the determination of salicylic in food, inspection methods and instruments or equipment for measurement. Such According to claim 1, where the ratio of food samples The appropriate Briston-Robinson buffer solution is 1: 15-1: 20, or optimum 1:20. 6. The system for the determination of salicylic in food by the Electrochemistry, inspection methods and apparatus or equipment for such measurements. According to claim 1, which is applied for the 3rd page of the 3 pages, the total salicylic content in fresh and processed food Measured in ppm concentration units (ppm) ------------ ------ 20/10/2017 ------ (OCR) page 1 of 2 pages. 1. A system for the electrochemical determination of salicylic in food consisting of: a. Screen printing probe which is a bipolar probe. That contains - Carbon working electrodes It is an electrode that undergoes an oxidation reaction of Measured salicylic - silver / silver chloride (Ag / AgCl) reference electrode is responsible for The electrochemical techniques used in electrochemical measurements are differential pulse voltammetric techniques. Chemical used to control the change in pH and base during the The salicylic solution was measured from the sample to be measured, namely, Briston-Robinson concentrated 0.4 molar pH buffer solution, pH 2.0-11.0 d. The electrolyte solution used in the measurement was Salt solution Which can be selected from a solution of potassium chloride, sodium chloride One of or more than one concentration of 0.01-0.1 molar concentration. Conditions used in electrochemical measurements by differential techniques The pulse voltmeter is Potential change rate of 0.02 volts at interval time 0.7 s and modulation amplitude of 0.15 volts at 0.4 -1.5 volts potential range. A 2. System for the electrochemical determination of salicylic in food According to claim 1, where chemicals used to control changes in pH and base during saline measurements The silic from the sample to be measured was the Briston-Robinson concentrated 0.4 molar buffer with pH suitable for extraction at pH 2.0. 3. System for the electrochemical determination of salicylic in food. According to claim 1, where the most suitable electrolyte solution used for measurement was 0.05 m of sodium chloride concentration, page 2 of 2 pages. 4. System for the electrochemical determination of salicylic in food According to claim 1, where the ratio of the food samples used for measurement to the appropriate Briston-Robinson buffer solution is 1: 15-1: 20, or the optimum 1:20. 5.System for the electrochemical determination of salicylic in food According to claim 1, where a disposable screen printing probe is used It consists of two electrodes with a carbon-based electrode and a reference electrode made of silver / silver chloride (Ag / AgCl), where the sample volume is used. Less at the microliter level 6.System for the electrochemical determination of salicylic in food According to claim 1, which is applied to measure the total salicylic content in fresh and processed food, measured in ppm concentration (ppm). 7. An apparatus or equipment for the determination of salicylic substances in food consists of a system for Measuring salicylic with electrochemical method In accordance with claim 1, where there is a component of a) power supply b) electrical control and response measurement c) signal processing and analysis section. There are working steps: 1) Generate a differential pulse voltammetric current signal according to the set parameters 2) Read the electrochemical signal that causes oxidation and reduction. 3) Record the signal and display it on the screen in the form of salicylic content in Ppm unit 4) Adjust the set to select the oxidation peak height and calculate to translate the result to The concentration of salicylic on the screen d) The display and the command input (Human interface and controller) is a touch screen consisting of a command button to measure. And measurement display ------------