Front processing method of emulsion (grease) type cosmetic and quick detection method of lead in same

A detection method and a cosmetics technology, which are applied in the preparation of test samples, material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, etc. Detection, complex operation and other problems, to achieve high detection accuracy, good use prospects, and good repeatability

Inactive Publication Date: 2012-07-18
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have respectively adopted atomic absorption spectrophotometer and spectrophotometer as detection instruments, adopting atomic absorption spectrophotometer can carry out accurate qualitative and quantitative analysis of heavy metal lead, but atomic absorption spectrophotometer is relatively expensive, which is not conducive to the The promotion of the method; the dithizone method uses the highly toxic substance potassium cyanide, which undoubtedly increases the safety risk of the testing personnel; and these two methods are time-consuming, complicated to operate, and the amount of added chemical solvents is likely to cause pollution, etc. Naturally, it cannot be used as a popularization method for the rapid detection of lead in cosmetics

Method used

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  • Front processing method of emulsion (grease) type cosmetic and quick detection method of lead in same
  • Front processing method of emulsion (grease) type cosmetic and quick detection method of lead in same
  • Front processing method of emulsion (grease) type cosmetic and quick detection method of lead in same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Effect of Surfactant

[0033] Take 2 parts of 5ml standard lead solution with a concentration of 39, 40, and 41 μg / ml, respectively, as group A and group B. A certain amount of amphoteric surfactant is added to the standard lead solution of group A, and no surfactant is added to the standard lead solution of group B. , to compare the effect of adding amphoteric surfactants on color difference. Group A added 0.1 g of surfactant amphoteric imidazoline hydroxypropyl sulfonate sodium oleate and about 5 ml of 70% ethanol aqueous solution, and the total volume was controlled at 10 ml; Group B was added with 5 ml of 70% ethanol aqueous solution, and the total volume was also controlled at 10 ml. Then add xylenol orange to groups A and B respectively at a concentration of 1.961×10 -4 mol / L buffer solution, mix well.

[0034] Compare the color shades of the three chelate products in groups A and B respectively, and the results are shown in Table 1:

[0035] Table 1...

Embodiment 2

[0038] Embodiment 2: detection of standard-added blank sample

[0039] Add 2.5ml concentration of 0, 10, 20, 30, 40 to the 2.5g lead-free blank cosmetic samples numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 respectively , 50, 60, 70, 80, 90, 100μg / ml standard lead solution, then add 0.1g surfactant and 5ml 90% ethanol aqueous solution, the total volume is controlled at 10ml, and then heat and reflux each sample to make the solution clear , then add 5ml of xylenol orange to a concentration of 1.961×10 -4 mol / L buffer solution, mixed evenly, pH 5.0-5.4, each sample was colorimetric, and the results are shown in Table 2.

[0040] Table 2

[0041]

[0042]

Embodiment 3

[0043] Embodiment 3: the influence of ethanol concentration on the blank sample of adding standard

[0044] Prepare standard spiked blank cosmetics with a lead concentration of 40 μg / g, then take 10 parts, each weighing 5g, numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, respectively numbered 1, 2, 4, 6, 8, 9, 10 add 0.1g surfactant and the concentration is 40, 50, 60, 70, 80, 90, 100% ethanol aqueous solution 5ml; Add 50, 60, and 70% ethanol aqueous solutions into the colorimetric tubes respectively, without adding surfactants, heat and condense to reflux, and investigate the clarification of the standard-added blank cosmetic raw materials. The results are shown in Table 3 below:

[0045] table 3

[0046]

[0047]

[0048] Comparing 2 and 3, 4 and 5, 6 and 7, it can be seen that the addition of surfactant not only increases the color sensitivity of xylenol orange metal chelate, but also promotes the state change of creamy cosmetics.

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Abstract

The invention discloses a front processing method of emulsion (grease) type cosmetic and a quick detection method of lead in the same. The front processing method includes adding emulsion type or grease type cosmetic into a container, then adding amphoterics and ethanol water with volume fraction ranging from 50% to 100%, and heating a colorimetric cylinder to obtain clear solution. The quick detection method of lead in the emulsion (grease) type cosmetic is that buffered solution containing 150-180mg / kg of xylenol orange is added into the clear solution obtained by the front processing under the heating condition to enable pH of a mixing system to be in a range from 4 to 6, clear sample solution to be tested is obtained after the mixture is evenly mixed, and then visual observation color comparison is conducted on the sample solution to be tested and standard sample solution obtained by standard lead solution through the same processing. The detection method of the lead is high in accuracy, good in repeatability and simple and quick to operate and has good using prospect.

Description

(1) Technical field [0001] The invention relates to a pretreatment method of milk (cream) cosmetics and a rapid detection method of heavy metal lead in it, belonging to the technical field of rapid detection of cosmetics. (2) Background technology [0002] Lead is the only trace element not needed by the human body. It is a stable non-degradable pollutant and a heavy metal element that seriously endangers human health. Lead can hinder the formation of blood cells, leading to a decline in people's intelligence, low academic and work performance; to a certain extent, it will cause mental disorders, nightmares, insomnia, headache and other chronic poisoning symptoms; severe cases may also have fatigue, loss of appetite, Nausea, abdominal distension, abdominal pain or diarrhea, etc., more serious is that it affects infant growth, intellectual development, neurobehavioral and brain functions such as learning and memory, and can even cause dementia. [0003] Lead has good whiteni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N21/78
Inventor 付贤树叶子弘俞晓平崔海峰李佳
Owner CHINA JILIANG UNIV
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