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Continuous flowing method for measuring content of calcium carbonate in cigarette paper

A technology of calcium carbonate and cigarette paper, which is applied in the preparation of test samples, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions can solve problems such as deviations in test results and achieve The effect of improving the range, the method is simple, and the prospect of good application and promotion

Pending Publication Date: 2021-03-19
YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are reports in the prior art that the continuous flow method is used to detect the calcium carbonate content in the finished cigarette paper, the conventional continuous flow detection is prone to exceed the concentration range of the standard solution, especially when sampling wood pulp fibers or online pulp
In addition, for the detection of non-white cigarette paper, there are still deviations in test results caused by paper decolorization and other reasons in the prior art.

Method used

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  • Continuous flowing method for measuring content of calcium carbonate in cigarette paper
  • Continuous flowing method for measuring content of calcium carbonate in cigarette paper
  • Continuous flowing method for measuring content of calcium carbonate in cigarette paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1——Detection of calcium carbonate content in cigarette paper base.

[0038] 1. Experimental principle, materials and methods

[0039] 1.1 Experimental principle

[0040] The cigarette paper sample is reacted with a known and accurate amount of excess HCl solution and filtered, and the continuous flow method is used to pass potassium iodate, potassium iodide and the remaining H in the sample solution. + color reaction to detect the remaining H + , so as to deduce the content of calcium carbonate in the cigarette paper sample.

[0041] 1.2 Materials and Instruments

[0042] Potassium iodate (AR, Shanghai Runjie Chemical Reagent Co., Ltd.); Potassium iodide (AR, Shanghai Chemical Reagent Co., Ltd.); Hydrochloric acid (AR, Shantou Xilong Chemical Plant, Guangdong); Calcium carbonate (working reference reagent (capacity), Tongji Institute of Trace Elements); activated carbon particles (China Pharmaceutical (Group) Shanghai Chemical Reagent Company).

[0043] MET...

Embodiment 2

[0066] Example 2——Detection of calcium carbonate content in cigarette paper webbing slurry.

[0067] Repeat embodiment 1, have following difference: press Figure 4 The sampling point shown is W B Take 1000mL of non-white cigarette paper web surfing slurry, pour it into a clean tray, keep the liquid level, place it in an oven at 100°C and bake it to constant weight to obtain sample B. Weigh 0.5g (accurate to 0.01g) thin strips of sample B (about 0.5cm×2.5cm) baked at 105°C for 2h, put them into a 150mL beaker, add 4.5mL of 0.5mol / L hydrochloric acid solution, and use a glass rod to fully Stir until the fibers are dispersed and no air bubbles overflow, add 95.5mL of pure water, mix well and filter with qualitative filter paper, add 5g of activated carbon particles with a particle size of 400 mesh to the filtrate, shake for 25min to decolorize, filter with qualitative filter paper, and collect the filtrate as a sample Solution B is ready for use.

Embodiment 3

[0068] Example 3——Detection of calcium carbonate content in wood pulp fiber of cigarette paper.

[0069] Repeat embodiment 1, have following difference: press Figure 4 The sampling point shown is W 01 (or W 02 ) to take 1000mL of non-white cigarette paper wood pulp fiber, pour it into a clean tray, keep the liquid level flat, place it in an oven at 100°C and bake it to constant weight to obtain sample C. Weigh 0.5g (accurate to 0.01g) thin strips of sample C (about 0.5cm×2.5cm) baked at 105°C for 2 hours, put them into a 150mL beaker, add 4.5mL of 0.5mol / L hydrochloric acid solution, and use a glass rod to fully Stir until the fibers are dispersed and no air bubbles overflow, add 95.5mL of pure water, mix well and filter with qualitative filter paper, add 5g of activated carbon particles with a particle size of 400 mesh to the filtrate, shake for 25min to decolorize, filter with qualitative filter paper, and collect the filtrate as a sample C solution is ready for use.

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Abstract

The invention discloses a continuous flowing method for measuring the content of calcium carbonate in cigarette paper. The method comprises the following steps of: drying a to-be-detected sample, adding an excessive hydrochloric acid solution, realizing full reaction, and performing filtering to obtain a sample solution; and measuring an instrument observation value of calcium carbonate corresponding to residual H <+> in the sample solution by using a continuous flow analyzer, and calculating to obtain the content of the calcium carbonate in the sample. An existing continuous flow analysis technology is improved, and an online dilution channel is added before the sample solution enters a dialyzer, so that the highest CaCO3 content corresponding to a standard working solution reaches 125.0mg, the linear correlation coefficient r2 reaches 0.999 or above, the detection range is remarkably widened; and the detection method can simultaneously meet the requirements of measuring various samples such as cigarette paper sheet bases, wood pulp fibers or pulp and the like. The method is simple, convenient, quick and accurate to operate, is very suitable for measuring large-batch samples, andhas good application and popularization prospects.

Description

technical field [0001] The invention belongs to the technical field of detection of physical and chemical indicators of cigarette paper, and in particular relates to a method capable of sampling at different nodes in the production process of cigarette paper, and for different samples obtained by sampling (including cigarette paper sheet base, wood pulp fiber, and netting pulp) ) method for the accurate determination of calcium carbonate content. Background technique [0002] Calcium carbonate is an important filler in the production of cigarette paper, which can improve the physical properties of cigarette paper, the whiteness of soot after burning, adjust the combustion performance of cigarette paper and improve the internal quality. However, the particle size of calcium carbonate used as a filler is extremely small and cannot be completely retained in the pulp fiber. The lost fine filler will enter the sewage system with the concentrated white water, which not only pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/38G01N1/34
CPCG01N21/78G01N1/38G01N1/34
Inventor 彭丽娟李苓王春琼陈丹李郸李雪梅
Owner YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION
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