Foods,
Год журнала:
2023,
Номер
12(15), С. 2980 - 2980
Опубликована: Авг. 7, 2023
In
this
study,
a
colorimetric
sensor
was
developed
for
the
detection
of
organophosphorus
pesticides
(OPs)
using
heterogeneous
nanozyme
with
phosphatase-like
activity.
Herein,
(Au-pCeO2)
obtained
by
modification
gold
nanoparticles
on
porous
cerium
oxide
nanorods,
resulting
in
synergistic
hydrolysis
performance
OPs.
Taking
methyl
parathion
(MP)
as
target
pesticide,
catalytic
and
mechanism
Au-pCeO2
were
investigated.
Based
Au-pCeO2,
dual-mode
MP
put
forward
analysis
product
via
UV-visible
spectrophotometer
smartphone.
Under
optimum
conditions,
strategy
can
be
used
on-site
concentrations
5
to
200
μM.
Additionally,
it
applied
pear
lettuce
samples
recoveries
ranging
from
85.27%
115.87%
relative
standard
deviations
(RSDs)
not
exceeding
6.20%,
which
provide
simple
convenient
method
OP
agricultural
products.
Analytical Chemistry,
Год журнала:
2024,
Номер
96(15), С. 6072 - 6078
Опубликована: Апрель 5, 2024
The
urgent
need
for
sensitive
and
accurate
assays
to
monitor
acetylcholinesterase
(AChE)
activity
organophosphorus
pesticides
(OPs)
arises
from
the
imperative
safeguard
human
health
protect
ecosystem.
Due
its
cost-effectiveness,
ease
of
operation,
rapid
response,
nanozyme-based
colorimetry
has
been
widely
utilized
in
determination
AChE
OPs.
However,
rational
design
nanozymes
with
high
specificity
remains
a
great
challenge.
Herein,
trace
amount
Bi-doped
core–shell
Pd@Pt
mesoporous
nanospheres
(Pd@PtBi2)
have
successfully
synthesized,
exhibiting
good
peroxidase-like
specificity.
With
incorporation
bismuth,
there
is
more
than
4-fold
enhancement
performance
Pd@PtBi2
compared
that
Pd@Pt.
Besides,
no
significant
improvement
oxidase-like
catalase-like
activities
was
found,
which
prevents
interference
O2
undesirable
consumption
substrate
H2O2.
Based
on
blocking
impact
thiocholine,
colorimetric
detection
platform
utilizing
constructed
sensitivity
selectivity.
Given
inhibition
OPs
activity,
biosensor
further
developed
by
integrating
detect
OPs,
capitalizing
cascade
amplification
strategy.
OP
achieved
limit
as
low
0.06
ng
mL–1,
anti-interference
ability.
This
work
promising
construction
specificity,
well
development
biosensors.
