کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7139395 | 1462021 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Colorimetric paper-based device for gaseous hydrogen cyanide quantification based on absorbance measurements
ترجمه فارسی عنوان
دستگاه رنگ سنجی کاغذی برای اندازه گیری سیانید هیدروژن گاز بر اساس اندازه گیری جذب
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کلمات کلیدی
سنسورهای گاز، دستگاه های نقطه ای مراقبت، جذب، هیدروژن سیانید، دی متیل گلیکوزم مینیاتور کردن،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Hydrogen cyanide is a highly toxic compound employed for applications such as electroplating, production of organic solvents, fish stunning, and even as a chemical weapon. In this work, we describe a new microfluidic paper-based assay for selective cyanide determination, based on the reaction of the cyanide anion with palladium dimethylglyoximate (DMG) followed by colorimetric reaction of DMG with nickel. Quantification was performed by measuring the absorbance of light passing through the paper, employing an LED emitting at 525â¯nm and a log ratio amplifier circuit emulating Lambert-Beer's law. This offers an alternative to the smartphone-based methodologies for signal treatment usually employed in colorimetric μPAD-based methods The technique enabled linear calibration within the range 100-500â¯ppb of HCN, as well as a detection limit of 10â¯ppb for HCN in gaseous samples. The sampling time used for this concentration range was 5â¯min. The method was also tested for the quantification of cyanide in aqueous samples by adding H3PO4 to the sample, followed by exposure of the paper sensor to the gaseous HCN generated. A detection limit of 1â¯Î¼M was achieved, which makes the method also suitable for detection of cyanide in liquid samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 268, 1 September 2018, Pages 392-397
Journal: Sensors and Actuators B: Chemical - Volume 268, 1 September 2018, Pages 392-397
نویسندگان
João Flávio da Silveira Petruci, Peter C. Hauser, Arnaldo Alves Cardoso,