Sensitive and fast analysis of terbutaline sulfate in food
Terbutaline
sulfate (TBS) is a β2-adrenoceptor agonist, overdoses of which can
cause serious harm and even be life-threatening to humans. Herein, we
demonstrate a simple and facile method for the preparation of a
molybdenum disulfide–gold nanoparticle composite (MoS2/AuNPs). The
obtained MoS2 and MoS2/AuNPs were characterized and investigated by
X-ray powder diffraction, scanning electron microscopy, and transmission
electron microscopy.
An MoS2/AuNPs-modified glassy carbon electrode (MoS2/AuNPs/GCE) was
constructed using the dropping method and used to study the
electrochemical behavior of TBS. The results indicated that the sensor
had excellent electrocatalytic activity for TBS, with detection
sensitivity for TBS more than 100 times higher compared with the bare
GCE. With the successive addition of TBS, the peak current of the
differential pulse stripping voltammogram (DPSV) of TBS was proportional
to its concentration within a certain range, with a linear range of
1–85 nmol L−1 and limit of detection (LOD) of up to 0.47 nmol L−1.
Furthermore, the modified electrode showed good stability,
reproducibility, and anti-interference ability, meaning that it could be
used to detect TBS in real samples.
