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Pretreatment method for detecting metal elements in kapok powder

A technology for metal elements and kapok, which is applied in the field of pretreatment for detecting metal elements in kapok powder, can solve the problems of cumbersome operation process, large amount of reagents, polluted components, etc., and achieves good digestion effect, complete digestion and uniform dispersion. Effect

Active Publication Date: 2016-01-13
GUANGXI BOTANICAL GARDEN OF MEDICINAL PLANTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is a small amount of research on the detection of trace elements, the sample pretreatment is the traditional high-temperature ashing and electric hot plate heating acid digestion method. This open digestion method has the advantages of large reagent consumption, long time consumption, cumbersome operation, Very easy to cause pollution and loss of components and other disadvantages

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  • Pretreatment method for detecting metal elements in kapok powder

Examples

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example 1

[0025] A pretreatment method for detecting metal elements in kapok powder, comprising the following steps:

[0026] Step 1, pulverizing the kapok and putting it into a digestion tank, adding nitric acid with a mass fraction of 15% and hydrogen peroxide with a mass fraction of 30%, and standing for 10 hours; wherein, the nitric acid and hydrogen peroxide in each gram of kapok The addition amount is respectively 8 milliliters and 3 milliliters;

[0027] Step 2. Put the digestion tank into the digestion apparatus for microwave digestion. The microwave power used is 1600W; the specific procedure of microwave digestion is: first keep at 115°C for 3 minutes, then raise the temperature to 145°C within 3 minutes and Hold for 3 minutes, then increase the temperature to 158°C within 3 minutes and hold for 3 minutes, and finally increase the temperature to 175°C within 3 minutes and hold for 8 minutes;

[0028] Step 3. Transfer the digestion sample solution in the digestion tank to a po...

example 2

[0035] A pretreatment method for detecting metal elements in kapok powder, comprising the following steps:

[0036] Step 1, pulverizing the kapok and putting it into a digestion tank, adding nitric acid with a mass fraction of 15% and hydrogen peroxide with a mass fraction of 30%, and standing for 14 hours; wherein, the nitric acid and hydrogen peroxide in each gram of kapok The addition amount is respectively 12 milliliters and 5 milliliters;

[0037] Step 2. Put the digestion tank into the digestion apparatus for microwave digestion. The microwave power used is 1600W; the specific procedure of microwave digestion is: first keep at 125°C for 7 minutes, then raise the temperature to 155°C within 7 minutes and Hold for 7 minutes, then increase the temperature to 165°C within 7 minutes and hold for 7 minutes, and finally increase the temperature to 185°C within 7 minutes and hold for 12 minutes;

[0038] Step 3. Transfer the digestion sample liquid in the digestion tank to a poly...

example 3

[0045] A pretreatment method for detecting metal elements in kapok powder, comprising the following steps:

[0046] Step 1, putting kapok pulverized into a digestion tank, adding nitric acid with a mass fraction of 15% and hydrogen peroxide with a mass fraction of 30%, and standing for 12 hours; wherein, the nitric acid and hydrogen peroxide in each gram of kapok The addition amount is respectively 10 milliliters and 4 milliliters;

[0047] Step 2. Put the digestion tank into the digestion apparatus for microwave digestion. The microwave power used is 1600W; the specific procedure of microwave digestion is: first keep at 120°C for 5 minutes, then raise the temperature to 150°C within 5 minutes and Hold for 5 minutes, then increase the temperature to 160°C over 5 minutes and hold for 5 minutes, and finally increase the temperature to 180°C over 5 minutes and hold for 10 minutes.

[0048] Step 3. Transfer the digestion sample liquid in the digestion tank to a polytetrafluoroeth...

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Abstract

The invention discloses a pretreatment method for detecting metal elements in kapok powder. The pretreatment method comprises the steps that 1, kapok is crushed and then put into a digestion tank, and nitric acid and hydrogen peroxide are added into the digestion tank; 2, the digestion tank is put into a digestion instrument for microwave digestion; 3, digestion sample liquid in the digestion tank is transferred into a polytetrafluoroethylene crucible, the digestion tank is washed with ultrapure water, all washing liquid is gathered into the polytetrafluoroethylene crucible, and heating is performed for removing the acid; 4, when the polytetrafluoroethylene crucible is cooled to room temperature, the liquid in the polytetrafluoroethylene crucible is all transferred into a volumetric flask, the polytetrafluoroethylene crucible is washed with the ultrapure water, and all the washing liquid is gathered into the volumetric flask, and constant volume is performed with nitric acid with the mass fraction of 2%. Compared with traditional open type methods such as an ashing method and an acid heating digestion method, the pretreatment method has the advantages of being short in time consumption, little in pollution and reagent amount consumption, thorough in digestion and good in reproducibility, and the problem that organic substances left in sample decomposition disturb detection can be effectively solved.

Description

technical field [0001] The invention relates to the field related to the detection of trace elements in medicinal materials. More specifically, the present invention relates to a pretreatment method for detecting metal elements in kapok powder. Background technique [0002] Kapok, also known as Panzhihua and Banzhihua, is produced in Guangdong, Guangxi, Yunnan, Sichuan and other places. Nature and flavor are sweet, light, cool; belong to the large intestine meridian; have the effect of clearing away heat and promoting dampness, and detoxification; used for diarrhea, dysentery, hemorrhoids, and bleeding. Kapok is often used in compound Chinese medicines. Many Chinese patent medicines or herbal teas made of kapok are included in the pharmacopoeia and ministerial standards. For example, Erwuwei Songshi Wan and Bawei Chenxiang Powder are collected in the Pharmacopoeia of the People's Republic of China. In 2010 (part one); Jinju Wuhuacha Granules were recorded in the "Ministry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44
Inventor 韦筱媚赵以民胡营唐美琼黄勇张月云
Owner GUANGXI BOTANICAL GARDEN OF MEDICINAL PLANTS
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