Acid-base titration using a microfluidic thread-based analytical device (μTAD)

Purim Jarujamrus, Akarapong Prakobkij, Sodsai Puchum, Sawida Chaisamdaeng, Rattapol Meelapsom, Wipark Anutrasakda, Maliwan Amatatongchai, Sanoe Chairam, Daniel Citterio

研究成果: Article査読

11 被引用数 (Scopus)


This work presents the development and application of a novel analytical approach for the determination of acid and base concentrations by titration using a microfluidic thread-based analytical device (μTAD). This approach proved to be a simple to fabricate and to use, high precision, and cost-efficient means of acid-base quantification. The μTAD was fabricated by immobilizing the untreated cotton threads onto a wood frame, followed by pre-coating with an indicator (20 μL) and a primary standard solution (3 μL), and was tested using real samples including drug, food, and household products where 3 μL of each sample was dropped onto the center of a thread. Afterward, the distance of color change on the thread, easily observed and measured using the naked eye and a ruler, was used for analysis. The analysis using the μTAD, completed within 2 minutes and validated by the conventional titration, showed high accuracy and precision (RSD < 12.9%), good linearity ranges and low limit of quantification. The fabricated μTAD also remained stable for an extended period of time (>2 weeks under various storage conditions).

出版ステータスPublished - 2020 7月 7

ASJC Scopus subject areas

  • 分析化学
  • 生化学
  • 環境化学
  • 分光学
  • 電気化学


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