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Rapid detection method of azo dye product

The technology of an azo dye and a detection method is applied in the field of rapid detection of azo dye products, which can solve the problems of expensive internal standard substance, large loss of target substance, low recovery rate, etc., so as to improve the detection accuracy, and the method is simple and fast. , the effect of improving the detection efficiency

Pending Publication Date: 2021-07-30
FOSHAN ZHONGFANGLIAN INSPECTION TECH SERVICE CO LTD
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Problems solved by technology

However, the accuracy of GC-MS quantitative detection is greatly affected by interference, the operational complexity of pretreatment increases the experimental time cost, and the expensive internal standard increases the detection cost
In addition, the standard pretreatment method has poor solubility of dyes in aqueous solutions and precipitation in the extraction process, which leads to poor subsequent extraction effects and greater loss of target objects; moreover, due to 2,4-diaminotoluene and 2,4-diaminoanisole have poor stability, and the recovery rate obtained by using this treatment method is low
At the same time, other relevant standards at home and abroad, such as: international standard ISO 14362-1:2017, national recommended standard GB / T 17592-2011, industry standard SN / T 3786.1-2014 are all for the detection of azo dyes in textiles, and do not involve other Detection of azo dyes in azo dye products

Method used

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  • Rapid detection method of azo dye product
  • Rapid detection method of azo dye product
  • Rapid detection method of azo dye product

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A rapid detection method for azo dyes in textiles, comprising pretreatment and detection of products, wherein the pretreatment includes the following steps:

[0042] Step 1): Weigh 0.2g (accurate to 0.0001g) of the dye-negative sample in a stoppered glass reactor, and add 30 μL of 24 aromatic amine standard solutions;

[0043] Step 2): Add 12.0 mL of 0.06 mol / L citrate buffer solution (pH=6.0) preheated to 70°C into the reactor, cover the stopper tightly, vortex and mix to make the sample fully wet, and react The device was placed in a 70°C water bath for ultrasonic extraction (frequency 40KHz, power 200W) for 10min;

[0044] Step 3): After the extraction is completed, add 3.0 mL of 200 mg / mL sodium dithionite aqueous solution to the reactor accurately, shake well, and react at a constant temperature of 70 ° C for 30 min;

[0045] Step 4): Take out the reactor and place it in an ice-water bath, let it cool down to room temperature within 2 minutes, add 0.2 mL of 20% so...

Embodiment 2

[0061] The difference between this embodiment and embodiment 1 is:

[0062] Pretreatment step 4): take out the reactor and place it in an ice-water bath, and cool it down to room temperature within 2 minutes.

Embodiment 3

[0064] The difference between this embodiment and embodiment 1 is:

[0065] Pretreatment step 2): Add 12.0 mL of 0.06 mol / L citrate buffer solution (pH=6.0) that has been preheated to 70°C, cover the stopper tightly, vortex and mix to make the sample fully wet, and place the reactor at 70 ℃ water bath static extraction for 15min.

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Abstract

The invention discloses a rapid detection method of an azo dye product. The rapid detection method comprises pretreatment and detection of the azo dye product, the pretreatment comprises the steps of adding a citrate buffer solution and a sodium hydrosulfite aqueous solution, adopting a diatomite column for adsorption and the like; and HPLC-DAD detection is adopted for detection. The existing standard sample pretreatment method is improved, and the detection parameters of the liquid chromatography are explored and optimized, such that the separation of the target aromatic amine component can be well achieved, the banned azo dye can be rapidly identified, the detection efficiency and the detection accuracy are improved, and the detection cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of detection of azo dye products, and in particular relates to a rapid detection method of azo dye products. Background technique [0002] Azo dyes are artificially synthesized dyes containing azo groups, which are widely used in the dyeing and printing of various textiles and the coloring of various paints, rubber, plastics, etc. Under special conditions, some of these dyes will decompose into carcinogenic aromatic amine compounds (a total of 24 types are involved). If these compounds are absorbed by the human body, they will cause cell lesions and then induce cancer. Therefore, this type of dye can be decomposed to produce carcinogenic aromatic amine compounds. The use of azo dyes is prohibited. In order to control such harmful substances from the source and prevent their downstream use from endangering human health, it is of great significance to detect such substances. [0003] The national mandatory s...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/027
Inventor 李应培张珍竹区少佳区丽华徐晓丽崔绮嫦李正海
Owner FOSHAN ZHONGFANGLIAN INSPECTION TECH SERVICE CO LTD
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