Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Device and method for determining calcium content in cigarette paper

A technology of calcium content and cigarette paper, applied in the field of chemical detection, can solve the problems of long processing time, slow detection speed, cumbersome manual operation, etc., and achieve the effects of fast processing, simple operation and less time-consuming

Active Publication Date: 2021-09-28
CHINA TOBACCO ZHEJIANG IND
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly includes flame atomic absorption spectrometry, inductively coupled plasma mass spectrometry, and EDTA titration. The former two methods require microwave digestion of samples, and the sample pretreatment takes a long time, while EDTA titration is cumbersome to operate manually and has a slow detection speed. The method has certain constraints for the analysis and determination of large batches of samples

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
  • Device and method for determining calcium content in cigarette paper
  • Device and method for determining calcium content in cigarette paper
  • Device and method for determining calcium content in cigarette paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Reagent configuration

[0051] 0.05mol / L nitric acid background solution

[0052] Pipette 3.45mL of concentrated nitric acid into a beaker filled with 300mL of distilled water, stir, and place to cool. Make up to 1000mL with distilled water. Add Brij35 (100 mL plus 2 drops).

[0053] pH11H 3 BO 3 -H 3 PO 4 -HAC buffer solution

[0054] Weigh 0.5g of boric acid into a 100mL beaker, add about 40mL of distilled water and stir to dissolve, add 0.54mL of concentrated phosphoric acid and 0.48mL of glacial acetic acid, stir to dissolve, and dilute to 100mL with distilled water. Then pour this solution into a 500mL beaker, and adjust the pH value to 11 with 0.5mol / L sodium hydroxide. Add Brij35 (100 mL plus 2 drops).

[0055] 1.0g / L developer

[0056] Weigh 0.1 g of DBC-ASA (DBC-arsine) and dissolve it in 100 mL of distilled water to obtain a DBC-arsine aqueous solution with a concentration of 1.0 g / L.

[0057] Calcium standard stock solution

[0058] Take an app...

Embodiment 2

[0080] Measurement wavelength selection

[0081] according to figure 1 Test the calcium sample extract and background solution (0.05mol / L nitric acid) respectively, collect the color-developed sample extract a sample and background solution b sample from the waste liquid outlet of the flow analyzer, and measure the absorbance with a UV spectrophotometer scan, the result is as Figure 4 shown. As can be seen from the figure, Ca 2+ For the complex formed with DBC-Arsenazo, the maximum absorption wavelength is at 630nm, the maximum absorption wavelength of the reagent blank is at 540nm, and 630nm is selected as the optimum wavelength for measurement in the experiment.

Embodiment 3

[0083] Optimization of test conditions

[0084] 1. The effect of pH on absorbance

[0085] According to the experimental method, the influence of buffer solution pH9.0~13.0 on the absorbance was investigated, and the results showed that the absorbance was the largest and the fluctuation was small at pH10~11, and pH11 was selected for the experiment.

[0086] 2. Effect of chromogenic agent on absorbance

[0087] The amount of chromogenic agent was tested at 0.6-1.6g / L, and the results showed that the absorbance of DBC-arsine was the largest at 1-1.1g / L, and 1g / L was selected for the experiment.

[0088] 3. Complex composition ratio

[0089] Using the molar ratio method and the equimolar continuous change method, the composition ratio of the complex is n(Ca):n(DBC-ASA)=1:2.

[0090] 4. Interference effects of coexisting ions

[0091] The content of the main interfering elements Mg, Al, etc. that coexist in cigarette paper is very low. The test found that under the selected D...

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

No PUM Login to View More

Abstract

The invention discloses a device and method for measuring the calcium content of cigarette paper. The sample liquid, the background liquid and the air are sent into the first glass coil through the background liquid pump tube, the sample pump tube and the first air pump tube respectively; Send it into the dialyzer, discharge the upper waste liquid after dialysis, then send buffer and air to the lower dialysate through the buffer pump tube and the second air pump tube respectively; output to the second glass coil after mixing, and at the same time The pure water pump sends pure water into the second glass coil; after mixing, it sends it into the third glass coil, and at the same time sends the developer into the third glass coil; The reaction solution is sent to the fourth glass coil, mixed evenly and then sent to the flow cell for colorimetry, and the effluent is discharged through the waste liquid pump tube. On the premise of ensuring the accuracy, precision and stability of the method, the present invention starts with simplified pretreatment, improves the detection efficiency of calcium content in cigarette paper, and realizes the purpose of rapid detection of large batches of samples.

Description

technical field [0001] The patent of the invention belongs to the field of chemical detection, and relates to an analysis technique for measuring calcium content in cigarette paper. Background technique [0002] Cigarette paper is an important part of cigarettes, and its characteristics directly affect the combustion performance, aroma and taste quality of cigarettes, and affect the release of harmful components in cigarette smoke. As a cigarette paper filler, calcium carbonate can affect physical properties such as air permeability and tensile strength of cigarette paper. Therefore, the determination of calcium (Ca) content in cigarette paper is of great significance for controlling the quality of cigarette paper. [0003] For the current analysis method standard of Ca content, please refer to "GB_5009.92-2016_National Standard for Food Safety_Determination of Calcium in Food". It mainly includes flame atomic absorption spectrometry, inductively coupled plasma mass spectr...

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 Patents(China)
IPC IPC(8): G01N21/78G01N21/33G01N1/28
CPCG01N1/28G01N21/33G01N21/78G01N2021/7763
Inventor 潘力曾天宝苏燕赵攀攀汤晓东陆扬蒋佳磊陆明华朱书秀
Owner CHINA TOBACCO ZHEJIANG IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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