Development of a portable colorimetric sensor using Prussian blue nanoparticles for the detection of hydrazine

• Published in: Microchemical journal 2025-01, Vol.208, p.112510, Article 112510
• Main Authors: Nghia, Nguyen Ngoc, Hieu, Nguyen Huu, Khanh, Dang Nguyen Nha, Vy, Ngo Thi Tuong, Phuong, Nguyen Thi Kim
• Format: Article
• Language: English
• Subjects: Arduino; Colorimetric sensor; Environmental analysis; Hydrazine detection; Prussian blue nanoparticles
• ISSN: 0026-265X
• DOI: 10.1016/j.microc.2024.112510

[Display omitted] •Portable sensor with PBNPs detects hydrazine concentrations.•Color changes from blue to colorless for quick detection.•LOD is 0.2 μM (spectrophotometer) and 9 μM (Arduino). The presence of hydrazine remnants in the environment may pose a risk to human well-being. Thus, it is imperative to devise an effective technique to detect hydrazine in samples obtained from the surroundings. Our works suggest a simple and efficient assay for hydrazine detection using Prussian blue nanoparticles (PBNPs). The addition of hydrazine caused a color change in PBNPs, turning their blue color into colorless by reducing Fe3+ to Fe2+ in their structure. We designed a portable device integrated with a color chip to measure the color change of PBNPs with varying concentrations of hydrazine. Our results showed that the proposed method can detect hydrazine at concentrations as low as 0.2 μM using a spectrophotometer and 9 μM using a portable device. Moreover, we validated the applicability of this method in detecting hydrazine in tap water samples.