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.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(19), P. 9027 - 9027
Published: Oct. 6, 2024
Nitrite,
a
collective
term
for
group
of
inorganic
compounds
containing
nitrite
ions
(NO2−),
is
widely
present
in
the
natural
environment
and
human
body.
It
has
wide
range
applications
medical,
food
environmental
fields,
such
as
additives,
water
treatment
agents
drugs.
However,
excessive
intake
poses
indirect
carcinogenic,
teratogenic
mutagenic
risks
to
humans.
With
in-depth
study
functional
properties
nitrite,
there
an
increasing
demand
accurate
efficient
methods
its
detection.
This
paper
presents
review
detection
which
will
cover
different
principles
technologies,
including
traditional
methods,
optical
electrochemical
sensors,
biosensors,
their
prospects.
By
comparing
evaluating
it
provide
references
valuable
suggestions
choosing
most
suitable
scientific
selection
alternatives
nitrite.
Langmuir,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 20, 2024
In
modern
analytical
chemistry,
one
of
the
primary
goals
is
to
develop
miniaturized,
easy-to-use
sensing
tools,
particularly
those
with
multitasking
capabilities.
this
work,
we
designed
a
mini-voltammetric
cell
that
integrates
modified
Au
microelectrode
(Au/Au
NPs
as
working
electrode)
and
an
Ag/AgCl
reference
electrode
installed
within
micropipette
tip.
This
combined
tool
not
only
enables
portable
on-site
microvolume
sampling─requiring
(around
20-40
μL)
or
single
droplet─but
also
facilitates
direct
micro-electroanalysis
in
short
time.
To
evaluate
its
capabilities,
was
optimized
for
trace
analysis
nitrite
ions
demonstrated
linear
responses
ranges
20-150
150-1200
μM,
acceptable
limit
detection
(LOD)
18.40
meeting
both
WHO
EPA
standards
levels.
Furthermore,
it
exhibited
high
selectivity,
stability
(up
36
continuous
measurements
3.24%
signal
drop),
repeatability
(RSD
2.98%,
