Method for detecting content of caffeine in tea leaves
A detection method and caffeine technology, which are applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of low detection accuracy and inability to accurately reflect the caffeine content in tea leaves, and achieve high detection accuracy, efficient adsorption, and improved detection accuracy. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0030] 1. Preparation of nanoadsorbent materials
[0031] FeCl 3 ·6H 2 O (1g), PEG-800 (0.6g) and trisodium citrate (1g) were ultrasonically dispersed in 100mL of ethylene glycol, then 4g of anhydrous sodium sulfate was added, the solution was stirred until clear, and then the solution was reacted at 200°C After 8 hours, centrifuge and dry, soak and absorb the obtained nanomaterial in 200 mL of butyric acid for 15 minutes to obtain a nano-adsorption material.
[0032] 2. Detection of caffeine content in tea
[0033] (1) After pulverizing 10 g of tea leaves, add 500 mL of ethanol to reflux for 1 hour, concentrate the reflux liquid, and freeze-dry to obtain 2.05 g of powdery solid;
[0034] (2) The powdered solid obtained in step 1 is ultrasonically treated in an aqueous solution for 5 min, filtered, and 4.10 g of nano-adsorbent material is added to the filtrate, ultrasonically treated for 2 min, and the nano-adsorbent material is collected after centrifugation;
[0035] (3)...
Embodiment 2
[0039] 1. Preparation of nanoadsorbent materials
[0040] FeCl 3 ·6H 2 O (1.1g), PEG-800 (0.7g) and trisodium citrate (1.2g) were ultrasonically dispersed in 120mL of ethylene glycol, then 6g of anhydrous sodium sulfate was added, the solution was stirred until clear, and then the solution was heated at 205°C The reaction was carried out for 8.5 hours, centrifuged and dried, and the obtained nanomaterial was soaked and adsorbed in 200 mL of butyric acid for 10 minutes to obtain a nano-adsorbed material.
[0041] 2. Detection of caffeine content in tea
[0042] (1) After pulverizing 10 g of tea leaves, add 500 mL of ethanol to reflux for 1.5 h, concentrate the reflux liquid, and freeze-dry to obtain 2.04 g of powdery solid;
[0043] (2) The powdery solid obtained in the step (1) is ultrasonically treated in an aqueous solution for 10 min, filtered, and 4.04 g of nano-adsorbent material is added to the filtrate, ultrasonically treated for 3 min, and the nano-adsorbent materia...
Embodiment 3
[0048] 1. Preparation of nanoadsorbent materials
[0049] FeCl 3 ·6H 2 O (1g), PEG-800 (0.7g) and trisodium citrate (1g) were ultrasonically dispersed in 100mL of ethylene glycol, then 5g of anhydrous sodium sulfate was added, the solution was stirred until clear, and then the solution was reacted at 200°C After 8.3 hours, centrifuge and dry, soak and absorb the obtained nanomaterial in 200 mL of butyric acid for 12 minutes to obtain a nano-adsorption material.
[0050] 2. Detection of caffeine content in tea
[0051] (1) After pulverizing 10 g of tea leaves, add 500 mL of ethanol to reflux for 1 hour, concentrate the reflux liquid, and freeze-dry to obtain 2.02 g of powdery solid;
[0052] (2) The powdery solid obtained in step 1 is ultrasonically treated in an aqueous solution for 8 minutes, filtered, 3 g of nano-adsorbent material is added to the filtrate, ultrasonically treated for 3 min, and the nano-adsorbent material is collected after centrifugation;
[0053] (3) U...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com