Food Safety and Health,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 28, 2024
Abstract
As
a
common
food
additive,
excessive
nitrite
poses
great
threat
to
human
health,
and
monitoring
its
content
in
products
is
of
importance
for
healthy
diet.
Currently,
the
detection
primarily
focused
on
fresh
dishes,
there
lack
research
variations
different
foods
under
various
storage
conditions.
In
this
study,
we
cascaded
nanozyme
catalysis
with
diazotization
reaction
developed
ratiometric
colorimetric
assay
dynamically
analyze
leftovers.
First,
nanoscale
MnFe
2
O
4
was
synthesized
as
an
oxidase
mimic
catalyze
colorless
3,3
′
,5,5
‐tetramethylbenzidine
(TMB)
oxidation
blue
TMBox.
Then,
process
produced
TMBox
took
place
stimulation
nitrite,
lowering
ultraviolet‐visible
absorption
signal
(652
nm)
assigned
simultaneously
generating
new
at
445
nm
ascribed
diazotized
Thus,
method
could
be
constructed
based
above
reversed
two
signals
high‐selectivity
determination,
providing
linear
range
1.76–180
μM
limit
0.12
μM.
By
employing
established
monitor
products,
it
found
that
overnight
leftovers
higher
than
presenting
increasing
trend
time.
addition,
potential
impacts
factors
dynamics
were
investigated,
some
implications
preservation
daily
consumption.
Analytical Chemistry,
Journal Year:
2024,
Volume and Issue:
96(28), P. 11353 - 11365
Published: July 6, 2024
Biothiols
play
essential
roles
in
maintaining
normal
physiological
functions,
resisting
oxidative
stress,
and
protecting
cell
health.
Establishing
an
effective
reliable
sensor
array
for
the
accurate
quantification
discrimination
of
diverse
biothiols
is
extremely
meaningful.
In
this
work,
Ag/Mn3O4,
Ag3PO4,
Ag3Cit
with
excellent
oxidase-mimetic
activity
surface-enhanced
Raman
scattering
(SERS)-enhanced
features
have
been
prepared
loaded
onto
Whatman
filter
paper
(WFP)
to
build
SERS
chips
as
three
sensing
channels,
which
can
induce
3,3′,5,5′-tetramethylbenzidine
(TMB)
oxidation
SERS-active
reporters
(TMBox)
concurrently
generate
prominent
signals.
Nevertheless,
addition
suppress
conversion
from
TMB
TMBox,
cause
reduction
signal
TMBox.
Interestingly,
each
channel
different
TMBox
signals'
variations
due
differences
inhibition
abilities
exclusive
properties
chip,
be
plotted
specific
fingerprint
patterns
biothiol
further
translated
into
intuitive
two-dimensional
(2D)
clustering
profiles
through
linear
discriminant
analysis
(LDA)
hierarchical
cluster
(HCA)
techniques
precise
identification
these
six
minimum
concentration
1
μM.
More
importantly,
exploited
intracellular
glutathione
(GSH),
differentiate
between
cancer
cells
based
on
GSH
contents
even
identify
types
tumor
cells,
demonstrating
its
powerful
application
prospects
disease
diagnosis.
Small,
Journal Year:
2023,
Volume and Issue:
20(22)
Published: Dec. 15, 2023
Abstract
Ensuring
an
appropriate
nitrite
level
in
food
is
essential
to
keep
the
body
healthy.
However,
it
still
remains
a
huge
challenge
offer
portable
and
low‐cost
on‐site
analysis
without
any
expensive
equipment.
Herein,
integrated
electrochemical
sensing
system
(IESS)
developed
achieve
rapid
detection
food,
which
composed
of
disposable
microfluidic
patch
for
few‐shot
detection,
reusable
smartphone‐assisted
electronic
device
based
on
self‐designed
circuit
board
signal
processing
wireless
transmission.
The
MXene‐Ti
3
C
2
T
x
/multiwalled
carbon
nanotubes‐cyanocobalamin
(MXene/MWCNTs‐VB
12
)‐modified
working
electrode
achieves
high
sensitivity
10.533
µA
m
−1
low
limit
4.22
µ
owing
strong
electron
transfer
ability
hybrid
MXene/MWCNTs
conductive
matrix
selectivity
VB
bionic
enzyme‐based
ion‐selective
layer.
Moreover,
IESS
can
rapidly
collect
pending
testing
samples
through
within
1.0
s
conduct
immediate
analysis,
then
wirelessly
transmit
data
from
signal‐processing
smartphone
via
Bluetooth
module.
Consequently,
this
proposed
demonstrates
transmission
one
palm‐sized
device,
would
pave
new
avenue
safety
personal
bespoke
therapy.
