Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for detecting an iron ion concentration of a solution by utilizing nitrogen-doped carbon quantum dots

A technology of iron ion concentration and carbon quantum dots, applied in measurement devices, instruments, fluorescence/phosphorescence, etc., can solve the problems of high test cost, complicated operation, long time consumption, etc., and achieve simple and convenient detection process, high sensitivity and good effect. Effect

Inactive Publication Date: 2018-03-02
GUANGXI TEACHERS EDUCATION UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods for the determination of iron, such as ultraviolet spectroscopy and atomic absorption, but most of these methods are cumbersome, time-consuming, and expensive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for detecting an iron ion concentration of a solution by utilizing nitrogen-doped carbon quantum dots
  • A method for detecting an iron ion concentration of a solution by utilizing nitrogen-doped carbon quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method utilizing nitrogen-doped carbon quantum dots to detect the concentration of iron ions in a solution, comprising the following steps:

[0035] Step 1. To prepare nitrogen-doped carbon quantum dots, first add 2.5g of trypsin to 10ml of ultrapure water and mix and stir for 5 minutes to obtain a mixed solution, then transfer the prepared mixed solution to a 25ml reaction kettle for water treatment at 180°C Thermal reaction for 12 hours to obtain the nitrogen-doped carbon quantum dot crude liquid, the obtained nitrogen-doped carbon quantum dot crude liquid was centrifuged at a speed of 6000 rad / min to obtain the supernatant for filtration, filtered with a 0.22 μm filter to obtain the filtrate, and then the filtrate was used A dialysis bag with a molecular weight of 1000Da was dialyzed to obtain a dialysate, and the dialysate was vacuum-dried at 60°C for 24 hours to obtain water-soluble yellow fluorescent nitrogen-doped carbon quantum dots, and finally the obtained ni...

Embodiment 2

[0045] A method for detecting the concentration of iron ions in a solution by using nitrogen-doped carbon quantum dots, the process of which is roughly the same as in Example 1, the difference being that: when preparing nitrogen-doped carbon quantum dots in step 1, trypsin is added to ultrapure water After the mixed solution is prepared, the mixed solution is ultrasonically dispersed, the ultrasonic frequency is 28KHz, and the time is 20min, and then the ultrasonically treated mixed solution is subjected to infrared heating treatment, the heating rate is 2°C / min, and the final temperature is 54°C. Carry out the vacuum distillation operation in the middle, the air pressure decreases gradually at the speed of 250Pa / min, when the heating process ends, the air pressure also stops decreasing, maintain the temperature and air pressure conditions for 30min, and then raise the temperature to 78°C at a heating rate of 3°C / min °C, the air pressure decreases gradually at a rate of 400Pa / m...

Embodiment 3

[0048] A method for detecting the concentration of iron ions in a solution by using nitrogen-doped carbon quantum dots, the process of which is roughly the same as in Example 1, the difference being that: when preparing nitrogen-doped carbon quantum dots in step 1, trypsin is added to ultrapure water After the mixed solution is prepared, the mixed solution is ultrasonically dispersed, the ultrasonic frequency is 33KHz, and the time is 35min, and then the ultrasonically treated mixed solution is subjected to infrared heating treatment, the heating rate is 2°C / min, and the final temperature is 58°C. Carry out the vacuum distillation operation in the middle, the air pressure decreases gradually at the speed of 250Pa / min, when the heating process ends, the air pressure also stops decreasing, maintain the temperature and air pressure conditions for 30min, and then raise the temperature to 84°C at a heating rate of 3°C / min °C, the air pressure decreases gradually at a rate of 400Pa / m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

A method for detecting an iron ion concentration of a solution by utilizing nitrogen-doped carbon quantum dots synthesized by adopting pancreatin as a carbon source is disclosed. The method includes 1) preparing standard iron ion solutions containing nitrogen-doped carbon quantum dots and having different concentrations, detecting fluorescence intensity of the solutions to obtain fluorescence spectrums of the standard solutions, and establishing a linear relation between the fluorescence intensity and the iron ion concentration; and 2) preparing an iron ion sample solution containing the nitrogen-doped carbon quantum dots, detecting fluorescence intensity of the sample solution, and determining the iron ion concentration of the sample solution according to the linear relation. The nitrogen-doped carbon quantum dots are adopted as probes, and a characteristic that iron ions quench the nitrogen-doped carbon quantum dots is utilized to detect the iron ion concentration. A detection process is simple and convenient, sensitivity is high, a detection limit is low, and on-line in-situ rapid sensitive detection of the iron ion concentration can be achieved.

Description

technical field [0001] The invention relates to the field of iron ion concentration detection. More specifically, the present invention relates to a method for detecting the concentration of iron ions in a solution using nitrogen-doped carbon quantum dots Background technique [0002] Iron is one of the essential trace elements in the human body, is one of the main components of hemoglobin and heme, and plays an important role in human health. Too little or too much iron in the human body can cause various diseases, such as anemia, Parkinson's syndrome, Alzheimer's disease, cancer, etc. Therefore, it is of great significance to detect iron content. At present, there are many methods for the determination of iron, such as ultraviolet spectroscopy and atomic absorption, but most of these methods are cumbersome, time-consuming, and expensive. Compared with these traditional detection methods, the detection of fluorescent nanomaterials has the advantages of high sensitivity, g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428
Inventor 黄珊肖琦姚建东杨二利
Owner GUANGXI TEACHERS EDUCATION UNIV