An optical biochemical oxygen demand biosensor chip for environmental monitoring

被引:14
|
作者
Kashem, Md. Abul [1 ]
Suzuki, Masayasu [1 ,2 ]
Kimoto, Kazuki [2 ]
Iribe, Yasunori [2 ]
机构
[1] Toyama Univ, Grad Sch Innovat Life Sci, Toyama 9308555, Japan
[2] Toyama Univ, Fac Engn, Dept Elect & Elect Engn, Toyama 9308555, Japan
来源
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 221卷
关键词
Biosensor chip; Biofilm; Polyethylene-polypropylene film; Fluorescence intensity; Environmental samples; DISSOLVED-OXYGEN; FIBER BIOSENSOR; BOD; YEAST; MICROORGANISMS; SENSOR; SYSTEM;
D O I
10.1016/j.snb.2015.07.119
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
An optical biochemical oxygen demand (BOD) biosensor chip has been developed by embedding a biofilm onto an oxygen sensing film (OSF) shielded with polyethylene-polypropylene (PE-PP) film for effect free detection of organic pollution in environmental samples. The biofilm was prepared by immobilizing baker's yeasts (Saccharomyces cerevisiae) with polyvinyl alcohol-styrylpyridinium (PVA-SbQ) matrix and the OSF film was developed by coating the oxygen sensing ruthenium complex (dichloro tris (1,10-phenanthroline)-ruthenium(II)) dye solution (solubilized in nafion fluoropolymer matrix) onto a SO3 glass slide. Silicone rubber (SR) sheet was used to control the biofilm thickness and make the sample injection cavity. Fluorescence intensity (FI) of the biosensor was recorded by an inverted microscope which varies with the concentration of dissolved oxygen (DO) in samples. The biosensor responses were drawn as the changing of FI due to microbial respiration with BUD standard solutions, glucose-glutamic acid soluton (GGA). A good linear relationship was observed between the maximum responses, I-t=3/I-0 (I-t=3 = intensity at 3 min time and I-0 = intensity at 0 min time) and GGA concentrations (1 to 20 mg/L, R-2 = 0.99, n = 3) either in phosphate buffer solution (PBS) or in environmental samples such as river water (RW). The effects of environmental samples upon the sensor performance were completely eliminated due to shielding with only oxygen permeable PE-PP film onto the OSF. In addition, the suitable biofilm type, effects of heavy metals ions as well as preservation and stability of the biosensor also have been investigated. Finally, the newly proposed approach offers a promising and prospective tool for frequent monitoring of organic pollution in environmental samples. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:1594 / 1600
页数:7
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