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2000-2002 S&T e-Digest Contents


 

Vol. 37, Issue 11,  November 2003, pp. 24-29

 

Bullet

 

Nano Zinc Ferrite Acetic Acid Gas Sensors for Smuggled Drug Detection in Southern China

 

Zheng Jiao*, Minghong Wu, Zheng Qin, Jianzhong Gu, Minghua Lu

 

Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, P.R.China

*Author to whom correspondence should be addressed. E-mail: jiaozheng@yahoo.com

 

 

Received: 28 October 2003   /Accepted: 18 November 2003   /Published: 22 November 2003

 

Abstract: Drug abuse has been a big problem for China and the world. The detection of drugs became of great importance. In this paper, by analysis the characteristics of suppressed heroin drugs, it was found that most smuggled drugs in southern China is not pure heroin, but hydrochloric heroin. The hydrochloric heroin is easy to hydrolyze and release acetic acid. This result means that smuggled drugs can be indirectly detected by detecting volatilized acetic acid with gas sensor. In this paper the adulterated nano ZnFe2O4 gas sensors were used to detect acetic acid in low concentration. It was found that Ce and La adulterated ZnFe2O4 gas sensors have good sensitivity and selectivity to acetic acid, can be used in drug detection.

 

Keywords: Drug, Heroin, Acetic acid, Gas sensor

 

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