Academic Journal of Materials & Chemistry, 2023, 4(2); doi: 10.25236/AJMC.2023.040210.
Qi Gongwei1, Li Yueqiao1, Chen Yong1, Li Yuedong1, Ying Huijuan1, Shi Xiaoqin1, Wang Xuewu1, Hu Chengqun1, Chu Junwei1, Dai Wei2
1Jinhua Academy of Metrology and Quality Science, Jinhua, 321051, China
2College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
Precise detection of phthalates in the electronic and electrical product is essential. The method of the determination of four certain phthalates in the electronic and electrical product by high performance liquid chromatography (HPLC) was investigated in this study. The sample was extracted with n-hexane by Soxhlet extraction, then the extract was concentrated to dryness by rotary evaporation and diluted with methanol. The analytes were separated on a ADME (4.6×150 mm, 5 µm) chromatographic column with the column temperature 35 ℃. Methanol and water was used as mobile phase for gradient elution with the flow rate of 1.0 mL•min-1. The four certain phthalates were detected with DAD at the wavelength of 228 nm. Quantification analysis was performed by the external standard method. Linear relationships were found between the peak areas and the mass concentrations of the four certain phthalates in definite ranges, with detection limits (3S/N) of 5 mg·kg-1 and the low limits of determination (10S/N) of 10 mg·kg-1. Recovery rates obtained by standard addition method were in the range of 100.8~106.8% and RSDs (n=6) were less than 4%. The positive samples were further verified by LC-MS/MS.
Electronic and electrical product; High performance liquid chromatography; Phthalates; RoSH
Qi Gongwei, Li Yueqiao, Chen Yong, Li Yuedong, Ying Huijuan, Shi Xiaoqin, Wang Xuewu, Hu Chengqun, Chu Junwei, Dai Wei. Determination of Four Certain Phthalates in the Electronic and Electrical Product by High Performance Liquid Chromatography. Academic Journal of Materials & Chemistry (2023) Vol. 4, Issue 2: 59-63. https://doi.org/10.25236/AJMC.2023.040210.
[1] European Union (EU) RoSH Directive. Amending Annex II to Directive 2011/65/EU of the European Parliament and of the Council as regards the list of restricted substances. Commission Delegated Directive (EU) 2015/863, 2015.
[2] International Standard. Determination of certain substances in electrotechnical products-Part 8: Phthalates in polymers by gas chromatography-mass spectrometry (GC-MS), gas chromatography- mass spectrometry using a pyrolyzer/thermal desorption accessory (Py/TD-GC-MS), Annex B (informative) Determination of phthalates in polymers by liquid chromatography-mass spectrometry (LC-MS). IEC 62321-8, Edition 1.0 2017-03.