. Author manuscript; available in PMC: 2008 Aug 25.

Published in final edited form as: Anal Chem. 2007 Feb 13;79(6):2312–2319. doi: 10.1021/ac061986j

Table 1.

Comparison of QCM biosensors for the detection of E. coli

References	E. coli strains	Assay principle	LOD (cells/mL)	Linear ranges (cells/mL)
8	K-12	Immunosensor: Anti-ECA antibody cross-linked to PEI precoated surface	10⁶	10⁶-10⁹
17	O157:H7	Immunosensor: Antibody linked to MHDA SAM	10³	10³-10⁸
51	O157:H7	DNA sensor: Nanoparticle amplification	2.67 × 10²	2.67 × 10²-2.67 × 10⁶

Our results	E. coli strains	Assay principle	Reliable quantitative detection (cells/mL)	Linear ranges (cells/mL)
	W1485	Carbohydrate sensor	3.0 × 10⁷	2.9 × 10⁷-2.7 × 10⁸
	W1485	Carbohydrate/lectin sensor	7.5 × 10²	7.5 × 10²-7.5 × 10⁷

ECA: Enterobacterial common antigen; PEI: polyetheneimine; MHDA: 16-Mercaptohexadecanoic acid; SAM: self-assembled monolayer