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A method for rapid detection of heavy metal element lead in tobacco based on X-ray fluorescence

An X-ray, elemental lead technology is applied in the detection field of heavy metal element lead, which can solve the problems of long time, complicated operation, low efficiency, etc., and achieve the effects of simple testing process, high detection sensitivity and good specificity.

Active Publication Date: 2017-01-11
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, atomic absorption spectrophotometer (AAS) and tube-coupled plasma-mass spectrometer (ICP-MS) are usually used for the determination of lead content in tobacco, which is complicated, time-consuming and inefficient.
However, there is no report on the rapid detection of heavy metal element lead in tobacco using X-ray fluorescence

Method used

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  • A method for rapid detection of heavy metal element lead in tobacco based on X-ray fluorescence
  • A method for rapid detection of heavy metal element lead in tobacco based on X-ray fluorescence
  • A method for rapid detection of heavy metal element lead in tobacco based on X-ray fluorescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment discloses a method for rapidly detecting lead, a heavy metal element in tobacco, by using X-ray fluorescence, which includes a step of drawing a standard curve.

[0029] The samples used were: 6 pieces of flue-cured tobacco with known lead content.

[0030] combine figure 1 , the detection steps of this embodiment are:

[0031] (1) Sample pretreatment steps: first cut the tobacco into 1mm*5mm fragments, weigh enough tobacco fragments (>4g), put them into a quartz tube with a length of about 35cm, and seal both ends of the quartz tube with wire blocks; After the sample enrichment furnace is preheated to the enrichment carbonization temperature, insert the quartz tube into the furnace, turn on the reset button and start timing for 2 minutes, and wait for the red indicator light on the reset button of the sample enrichment furnace to light up, take out the quartz tube, place it for cooling, and set aside ;

[0032] (2) Preparation steps of the test sampl...

Embodiment 2

[0036] This example introduces the comparison between the results of the X-ray fluorescence spectrometry and the ICP-MS method.

[0037] The samples used were 5 flue-cured tobacco single cut tobacco.

[0038] The detection steps are:

[0039] (1) Pretreatment steps of the sample to be tested: first cut the tobacco into pieces of 1mm*5mm, weigh a sufficient amount of tobacco pieces (>4g), put them into a quartz tube about 35cm long, and seal the quartz tube with a wire block. Two ends; after the sample enrichment furnace is preheated to the enrichment carbonization temperature, insert the quartz tube into the furnace, turn on the reset button and start timing for 2 minutes, wait for the red indicator light on the reset button of the sample enrichment furnace to light up, take out the quartz tube, and place it for cooling ,spare;

[0040] (2) Preparation steps of the test sample: take two teaspoons of the enriched and carbonized black enrichment, put it in the sample cup, shak...

Embodiment 3

[0047] What this embodiment introduces is the accuracy and repeatability test of X-ray fluorescence spectrometry.

[0048] The sample used is shredded tobacco sample-2 in Example 2.

[0049] The detection steps are:

[0050] (1) Pretreatment steps of the sample to be tested: first cut the tobacco into 1mm*5mm fragments, weigh a sufficient amount of tobacco fragments (>4g), put them into a quartz tube with a length of about 35cm, and seal the quartz tube with a wire block. Two ends; after the sample enrichment furnace is preheated to the enrichment carbonization temperature, insert the quartz tube into the furnace, turn on the reset button and start timing for 2 minutes, wait for the red indicator light on the reset button of the sample enrichment furnace to light up, take out the quartz tube, and place it for cooling ,spare;

[0051] (2) Preparation steps of the test sample: take two teaspoons of the enriched and carbonized black enrichment, put it in the sample cup, shake the...

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Abstract

The invention discloses a method for rapidly detecting lead serving as a heavy metal element in a tobacco based on X-ray fluorescence. The method comprises the steps of sample pretreatment, sample preparation, quick detection on a peak area of the lead serving as the heavy metal element in tobacco through a handheld X-ray fluorescence spectrometer, and calculation of the concentration of the lead serving as the heavy metal element according to a provided concentration-response standard curve of the lead in the tobacco. Compared with the prior art, the method disclosed by the invention has the advantages of high detection sensitivity, high specificity, simplicity, quickness, safety, reliability and the like; a test process is very simple and quick, and is obviously better than the conventional standard method.

Description

technical field [0001] The invention relates to the technical field of detection of heavy metal element lead, in particular to a method for rapidly detecting heavy metal element lead in tobacco based on X-ray fluorescence. Background technique [0002] The heavy metal lead is a toxic element in nature and is harmful to the human body. When the soil, water, air and other environments are polluted by lead, lead enters the human body through the respiratory tract and food chain, and accumulates in the human body. The toxicity of lead is mainly manifested in: 1. Damage the intestinal tract, causing spasm of digestive tract smooth muscle and mesenteric blood vessels, and gastrointestinal bleeding; 2. Lead can cause high blood pressure, lead can interfere with the juxtaglomerular apparatus, stimulate bone secretion, stimulate renin and angiotensin, and cause 3, to lead-induced anemia, the toxic performance of lead is that after lead enters the human body for several hours, 95% ent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223
Inventor 文建辉杜文钟科军
Owner CHINA TOBACCO HUNAN INDAL CORP
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