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Method for rapidly screening free formaldehyde in cosmetics onsite

A technology for free formaldehyde and cosmetics, applied in the field of chemical analysis, can solve the problems of high cost, time-consuming pretreatment method, limited application scope, etc., and achieve the effect of bright color gradation, simple and fast method

Inactive Publication Date: 2013-07-03
谱尼测试集团深圳有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above detection methods are commonly used for instrument detection, and the sample pretreatment method is time-consuming and laborious, requiring professional operation, high cost, and it is difficult to be directly used for on-site rapid screening of formaldehyde in cosmetics, difficult to meet market demand and popularization, lack of practicability, and the scope of application is limited. limit

Method used

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  • Method for rapidly screening free formaldehyde in cosmetics onsite
  • Method for rapidly screening free formaldehyde in cosmetics onsite

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of standard color chart

[0029] Take formaldehyde standard stock solution 0, 0.5, 1.0, 2.0, 3.0, 4.0mL in a 50mL headspace bottle with a 5mL scale, add water to the 5mL scale, oscillate to mix, seal, heat in a porous electric heating mantle at 85°C for 30min, Use a 30mL glass syringe to draw 10mL of gas on the liquid surface of the headspace bottle, quickly inject it into a colorimetric tube containing 1mL of phenol reagent absorption solution, shake and absorb it, add 2mL ferric ammonium sulfate solution, dilute to 10mL, shake well, and place for 5min Afterwards, take a picture of the colored solution, collect the color and make it into a standard color card (see figure 1 ).

Embodiment 2

[0031] Weigh 1.00g of a certain hand lotion into a 50mL headspace bottle with a 5mL scale, add water to the 5mL scale, oscillate to mix, seal, heat in a porous electric heating mantle at 85°C for 30min, and use a 30mL glass syringe to fill the liquid in the headspace bottle Extract 10mL of formaldehyde vapor from the surface, quickly pour it into a colorimetric tube containing 1mL of phenol reagent absorption solution, add 2mL ferric ammonium sulfate solution after shaking and absorbing, add water to make the volume to 10mL, shake well, and observe the color of the solution after standing for 5min. Yellowish green, indicating that the sample contains free formaldehyde. The color of the sample is compared with the standard color card, which is close to the color of the 0.05% standard solution. The free formaldehyde in this sample is estimated to be around 0.05%, less than 0.2%, and the screening result is negative.

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Abstract

The invention discloses a method for rapidly screening free formaldehyde in cosmetics onsite. Whether the content of the free formaldehyde in cosmetics exceeds the limiting range of 0.2% is detected in a semiquantitative mode. The method comprises the following steps of: taking a sample and putting into a head space bottle, adding water, sealing, heating, vacuuming the air at the upper part, feeding into a phenol agent absorption solution, oscillating, adding an ammonium ferric sulfate solution, metering the volume to be 10mL, uniformly shaking, developing, comparing the color of the solution with a prepared standard color compassion card after 5 minutes so as to rapidly screen a positive sample. The method is simple to operate, free of interference in matrix color, remarkable in development reaction, free of professional personnel in operation and low in cost.

Description

technical field [0001] The invention belongs to the field of chemical analysis, and relates to a method for rapidly screening formaldehyde, in particular to a method for rapidly screening free formaldehyde in cosmetics on site. Background technique [0002] Formaldehyde (HCHO) is a volatile organic compound. On the list of priority control of toxic chemicals in my country, formaldehyde ranks second. Formaldehyde is defined as carcinogenic and teratogenic shape material by the World Health Organization, is the allergen of generally acknowledging, also is one of potential strong mutagen. Formaldehyde is used as a bactericidal preservative commonly used in cosmetics because of its good hydrophilicity, high bactericidal efficiency, low price, and not being affected by the pH in the system. As a preservative, the concentration of formaldehyde shall not exceed 0.2%; in nail hardeners, the concentration of formaldehyde shall not exceed 5%; at the same time, the content of formalde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 宋薇
Owner 谱尼测试集团深圳有限公司
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