Table 1.

Summary of the IgE determination limit obtained by various methods.

Method [reference]	Detection limit
QCM	50 pM
CE [26]	46 pM
ELISA [27] a	45 pM
Molecular Light Switch Complex [28]	100 pM
Fluorescence Anisotropy [29]	350 pM
Electrochemical Sensor [30]	158 pM

^aELISA method used antibody as bio-recognition element; other methods used aptamer as bio-recognition element.