Welcome to China Surfactant Detergent & Cosmetics, Today is

China Surfactant Detergent & Cosmetics ›› 2025, Vol. 55 ›› Issue (1): 125-130.doi: 10.3969/j.issn.2097-2806.2025.01.016

• Analytical methods and testing • Previous Articles    

Simultaneous determination of 10 sulfonamides in oral care toothpastes by high performance liquid chromatography

Zhenhua Dong1,*(),Meiyan Wang1,Wenbo Lu1,Jiandong Liu1,Zijian Wang1,Chao Chen2   

  1. 1. Department of Stomatology, Chengde Nursing Vocational College, Chengde, Hebei 067000, China
    2. Medical Technology Department, Chengde Nursing Vocational College, Chengde, Hebei 067000, China
  • Received:2024-08-30 Revised:2024-12-13 Online:2025-01-22 Published:2025-01-23
  • Contact: E-mail: dongzhenhua_88@163.com.

Abstract:

A method for simultaneous determination of 10 sulfonamides in the toothpaste by high performance liquid chromatography (HPLC) was established. 0.1% formic acid aqueous solution-methanol (volume ratio of 90:10) was used as the extraction solvent for the toothpaste sample solution, and the extraction method was ultrasonic extraction for 20 min in a 20 ℃ water bath. The HPLC conditions were as follows: The mobile phase: A was 0.1% formic acid aqueous solution, and B was methanol. The column temperature was 20 ℃; the injection volume was 10 μL, and the flow rate was 1.0 mL/min; the detection wavelength was 270 nm. The results of methodological investigation showed that the precision RSD of the 10 sulfonamides ranged from 0.90% to 1.49%, the stability RSD ranged from 0.61% to 1.42%, and the repeatability RSD ranged from 0.94% to 1.42%, and all RSDs were<2.0%. The 10 sulfonamides showed good linear relationship in the mass concentration range of 1-100 mg/L, with the correlation coefficients of 0.999 1-0.999 8. The average recovery rate of the 10 sulfonamides ranged from 91.99% to 110.82%, and the RSD ranged from 0.93% to 2.03%. This detection method was used to detect the content of the 10 sulfonamides in 20 toothpastes, and none of the 10 sulfonamides were detected in these 20 toothpastes. The HPLC method established in this work for simultaneous determination of 10 sulfonamides had good precision, stability, repeatability and accuracy, which was suitable for the detection of sulfonamides in toothpastes.

Key words: high performance liquid chromatography, toothpaste, sulfonamide

CLC Number: 

  • TQ658