The Testing and Technology Center for Industrial Products

Shenzhen, China

The Testing and Technology Center for Industrial Products

Shenzhen, China
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Wang C.,The Testing and Technology Center for Industrial Products | Liu C.,The Testing and Technology Center for Industrial Products | Lin J.,The Testing and Technology Center for Industrial Products | Xie T.,The Testing and Technology Center for Industrial Products | And 2 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2017

An effective method was established for rapid screening and confirmation of ultraviolet absorbers in textiles by ultra-high performance liquid chromatography/orbitrap high resolution mass spectrometry (UPLC/Orbitrap HRMS) technique. Ultraviolet absorbers in textiles were first ultrasonically extracted using methanol as the extraction solvent. Then, the extract was concentrated and analyzed by UPLC/Orbitrap HRMS. The quantitative analysis was carried out by the peak area in extracted chromatogram, and the concentration of each analyte was calibrated by the external standard method. The chromatographic separation of nineteen ultraviolet absorbers was carried out on a Hypersil Gold column (100 mm×2.1 mm, 1.9 μm) by gradient elution of methanol and water. The mass spectrometry analysis was carried out by Orbitrap HRMS in ESI+ and ESI- modes. Full-scan experiment was carried out in the range for m/z from 100 to 700. he screening and qualitative analysis were carried out by the retention time and the accurate mass of quasi-molecular ion and nineteen ultraviolet absorbers were routinely detected with mass accuracy errors below 2×10-6. The confirmation analysis for target compounds was performed with qualitative fragments obtained by data-dependent scan mode. The limits of quantification varied from 0.01 to 0.50 μg/kg. The blank samples were spiked at three levels, and the average spiked recoveries changed from 82.35% to 94.58% with the relative standard deviation (RSD)-changing from 3.37% to 9.98%. The proposed method was applied in the rapid screening of ultraviolet absorbers in textiles available commercially and UV-327 was detected in one sample. © 2017, Science Press. All right reserved.


Wang C.,The Testing and Technology Center for Industrial Products | Liao W.,The Testing and Technology Center for Industrial Products | Shi Q.,The Testing and Technology Center for Industrial Products | Shi Q.,Shenzhen University | And 2 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2016

This paper establishes an effective gas chromatography-tandem mass spectrometric (GC-MS-MS) method to determine the contents of seven benzotriazole ultraviolet absorbers in textiles simultaneously. Benzotriazole ultraviolet absorbers in textiles were first extracted at 60℃ by using dichloromethane as the extraction solvent with the assistance of microwaves. The extract was then condensed and analyzed by GC-MS-MS and calibrated by the external standard method. At the signal to noise ratio (S/N) of 10, the limit of quantification (LOQ) was 1.0 μg/kg for UV-320, and UV-328, and 0.5 μg/kg for UV-P, UV-326, UV-327, UV-329 and UV-350, respectively. The average recoveries changed from 82.69% to 93.24% under three different spiked levels, while the relative standard deviation (RSD) varied from 3.12% to 6.99%. The proposed method is simple, rapid, accurate and sensitive, and it could satisfy completely the technical demand for the determination of benzotriazole ultraviolet absorbers in textiles. The proposed method has been used to determine the contents of benzotriazole ultraviolet absorbers in commercially available textiles, and we have detected UV-327 in one sample. © 2016, Science Press. All right reserved.


Yang Z.-J.,The Testing and Technology Center for Industrial Products | Wang C.-Y.,The Testing and Technology Center for Industrial Products | Tong C.-F.,The Testing and Technology Center for Industrial Products | Yun P.,The Testing and Technology Center for Industrial Products | And 2 more authors.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2014

An effective method was established for the simultaneous determination of 18 kinds of banned polycyclic aromatic hydrocarbons (PAHs) in paper packaging materials which were intended to be used to contact with foodstuffs. PAHs in paper packaging materials were ultrasonically extracted with acetone-hexane (1:1) as the extraction solvent at 40.0°C, the extractive was purified by silica solid phase extraction column. The extractive was analyzed by gas chromatography-tandem mass spectrometry and the contents of each analytes were calibrated by external standard method. The limits of quantitation (LOQ) changed from 0.1 μg/kg to 2.0 μg/kg at the condition of signal/noise (S/N) of 10. At the same time, the correlation coefficients were all higher than 0.998. The spiked average recoveries varied from 57.5% to 96.4% while the relative standard deviation (RSD) changed from 3.0% to 9.8%. The method was rapid, simple, accurate and sensitive, which could satisfy completely the demand of the analysis of PAHs in paper packaging materials which were intended to contact with foodstuffs.


Wang C.,The Testing and Technology Center for Industrial Products | Fan X.,The Testing and Technology Center for Industrial Products | Huang M.,The Testing and Technology Center for Industrial Products | Ruan Y.,The Testing and Technology Center for Industrial Products | And 2 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2014

In order to avoid the interference of the non-banned isomers on the determination of 2, 4-diaminotoluene, an effective ultra-high performance liquid chromatography (UPLC) method was established. The spiked recoveries ranged from 63.67% to 78.90% while the relative standard deviation (RSD) of precision experiments all registered less than 5%. Under the condition of signal to noise S/N=3, the detection limit was 1.0, 0.5, 0.5 and 1.0 g/mL for 2, 3-diaminotoluene, 2, 4-diaminotoluene, 2, 6-diaminotoluene and 3, 4-diaminotoluene, respectively. Tests show that the proposed method is simple and rapid, only needing less than 5 minutes for the analysis procedure. This method is therefore reliable and accurate in quantity, and it also solves effectively the false positive problem in the analysis of 2, 4-diaminotoluene.

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