Method for measuring ammonia content in water base adhesive for tobaccos

A technology for cigarette water-based glue and content, which is applied in the field of cigarette processing to achieve the effects of improving purification effect, accurate measurement results and good repeatability

Active Publication Date: 2013-06-19
HONGYUN HONGHE TOBACCO (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the determination method of ammonia in water-based glue for tobacco

Method used

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  • Method for measuring ammonia content in water base adhesive for tobaccos
  • Method for measuring ammonia content in water base adhesive for tobaccos
  • Method for measuring ammonia content in water base adhesive for tobaccos

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Determination of ammonia content in tobacco water-based glue (the determination process is as follows figure 1 shown)

[0037] (1) Preparation of extract: Accurately weigh 1.0 g of 36%-38% HCl solution, and dilute to 1 L with 18.2Ω deionized water to obtain 10 mmol / L hydrochloric acid aqueous solution.

[0038] (2) Preparation of the standard working solution: the ammonia standard solution was purchased from the National Material Center, the concentration is: 1000 μg / mL, the specific preparation method of the ammonia standard working solution with a concentration gradient is: pipette 1 mL NH 4 + Standard solution, dilute to 100 mL volumetric flask with 10 mmoL / L hydrochloric acid aqueous solution to obtain NH with a concentration of 10 μg / mL 4 + For the primary standard solution, take 0.5 mL, 1.0 mL, 3.0 mL, 5.0 mL, 10 mL, 15 mL, and 20 mL of the primary standard solution respectively, and dilute it to a 100 mL volumetric flask with 10 mmoL / L hydrochloric acid a...

Embodiment 2

[0056] Determination of ammonia content in different brands of tobacco water-based adhesives:

[0057] 1. Preparation of sample solution: Accurately weigh 0.3 g of each of the 6 brands of tobacco water-based adhesive samples, put them into a 50 mL conical flask, and accurately add 20 mL of 10 mmoL / L hydrochloric acid aqueous solution with a pipette, 150 r / min Shake for 10 min, pipette 10 mL into a centrifuge tube and centrifuge at 6500 r / min for 20 min, take the supernatant and pass it through a 0.2 μm aqueous phase filter membrane, and analyze it on an ion chromatograph; the chromatogram of ammonia in the sample is as follows: Figure 4 shown.

[0058] 2, adopt the chromatographic condition analysis sample solution of embodiment 1; The chromatogram of ammonia in the sample is as Figure 4 shown.

[0059] 3, the chromatographic peak area that records ammonia is brought into the standard equation of embodiment 1, obtains the content of ammonia in the sample, calculat...

Embodiment 3

[0064] The present embodiment verifies the repeatability and standard addition recovery of the inventive method:

[0065] Add different concentrations of standard working solutions to the samples respectively, measure each sample 3 times, measure the chromatographic analysis conditions with the same embodiment 1, and calculate the recovery rate of ammonia in the water-based glue for tobacco and the concentration after the addition of the standard according to the analysis results. The relative standard deviation of determination, the result is as shown in table 6:

[0066] Table 6 Standard addition recovery and relative standard deviation results

[0067]

[0068] It can be seen from Table 6 that the recovery rate of ammonia is between 94% and 101%, and the average relative standard deviation (RSD) is between 2.0 and 5.0, which shows that the recovery rate of the method of the present invention is high and the repeatability is good.

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Abstract

The invention discloses a method for measuring the ammonia content in a water base adhesive for tobaccos. The method comprises the following steps of: oscillating and extracting a water base adhesive sample for tobaccos by using a hydrochloric acid aqueous solution; centrifuging and filtering extract liquor and analyzing the extract liquor on an ion chromatograph; preparing NH4 standard working solutions with different concentrations at the same time and analyzing the NH4 standard working solutions by using the ion chromatograph; quantitatively analyzing by using an external standard method and performing regression analysis according to the chromatographic peak area of ammonia and corresponding concentration of the ammonia so as to obtain a standard curve, wherein a relevant coefficient is more than or equal to 0.999; and measuring the prepared sample to measure the peak area of the ammonia in the measured sample and introducing the peak area value into the standard curve so as to obtain the ammonia content in the sample, wherein the nature of the ammonia content is determined according to a standard substance retention time and the quantity of the ammonia content is determined according to the peak area. By the method, the ammonia content in the water base adhesive for the tobaccos can be detected effectively; the method is quick to operate and easy and feasible; interferences of various ions, particularly sodium ions, are eliminated by adopting gradient elution; quick measurement for the ammonia content in the water base adhesive for the tobaccos is realized and the blank of the measurement for the ammonia in the water base adhesive for the tobaccos is filled.

Description

technical field [0001] The invention belongs to the technical field of cigarette processing, and relates to a physical and chemical inspection technology for tobacco water-based glue, in particular to a method for measuring ammonia content in tobacco water-based glue. Background technique [0002] Tobacco water-based adhesive is an indispensable material in the cigarette production process. At present, most of the adhesives used in domestic cigarette production are chemically synthesized water-based adhesives. According to the relevant testing standards for tobacco water-based adhesives, pH measurement is an important task. An important indicator, in order to make the pH value of the tobacco water-based adhesive meet the corresponding technical standards, some merchants will pass ammonia gas to adjust the pH value, so the residual ammonia in the product will not only bring unpleasant pungent smell, but also seriously Affect the sensory quality of cigarette products. Because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N1/28
Inventor 范多青王庆华史小波李响丽郭丽娟杨艳萍叶灵
Owner HONGYUN HONGHE TOBACCO (GRP) CO LTD
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