ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of sodium bicarbonate in compositions of smoke-type fireworks based on automatic potentiometric setting dynamic pH titration method

Lie-yuan Zhang, Jie-guang Liu, Ying Han, Shu-min Zhang, Long-fa Jiang, Chun-rui Zhan, Chen-hui Zeng, and Wen-jun Wang

Technical Center of Nanchang Customs, Nanchang, China

E-mail: zhanglieyuan1992@126.com

Received: 8 February 2023  Accepted: 17 September 2023

Abstract:

An automatic potentiometric setting dynamic pH titration method for the determination of sodium bicarbonate in compositions of smoke-type fireworks was developed. After wetting the sample with 0.1 mL ethanol, added 60 mL of deionized water for dissolution, ultrasound for 10 min, filtered and removed the insoluble matter, and then used a potentiometric titrator to drop 0.1 mol/L of hydrochloric acid. The experimental results showed that the limit of quantitation was 0.1%, the recoveries were 96.1–104.8% and the relative standard deviation was 0.56–3.11% when the sample weigh 0.2 g. The automatic potentiometric setting dynamic pH titration method is simple to operate and can accurately and quickly determine the content of sodium bicarbonate in compositions of smoke-type fireworks.

Keywords: Automatic potentiometric titration; pH method; Sodium bicarbonate; Compositions in smoke-type fireworks

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03099-2

Chemical Papers 78 (1) 645–650 (2024)