A
simple
needle-trap
device
(NTD)
coupled
with
gas
chromatography–mass
spectrometry
(GC–MS)
was
developed
for
the
detection
of
trace
levels
nitrobenzene
compounds
(NBs)
in
workplace
air.
The
NTD
sorbent
inside
needle
applied
and
quantification
seven
volatile
NBs:
nitrobenzene,
o-nitrotoluene,
m-nitrotoluene,
p-nitrotoluene,
o-nitrochlorobenzene,
m-nitrochlorobenzene,
p-ntrochlorobenzene.
optimum
temperature
time
desorption
analytes
were
270
°C
4
min,
parameters
such
as
sampling
flow
rate,
breakthrough
volume,
storage
capability
also
investigated.
Limits
ranges
1.8
×
10-4–1.1
10-3
5.9
10-4–3.6
mg
m-3,
respectively.
proposed
method
successfully
analysis
NBs
vehicle
repair
plants
where
highest
detected
concentration
0.11
m-3.
NTD–GC–MS
established
present
study
may
be
generally
applicable
monitoring
Analytical Chemistry,
Год журнала:
2024,
Номер
96(23), С. 9325 - 9331
Опубликована: Май 17, 2024
Various
hazardous
volatile
organic
compounds
(VOCs)
are
frequently
released
into
environments
during
accidental
events
that
cause
many
hazards
to
ecosystems
and
humans.
Therefore,
rapid,
sensitive,
on-site
detection
of
VOCs
is
crucial
understand
their
compositions,
characteristics,
distributions
in
complex
environments.
However,
manual
handling
remains
a
challenging
task,
because
the
inaccessible
health
risk.
In
this
work,
we
designed
quadruped
robotic
sampler
reach
different
for
capturing
trace
using
needle
trap
device
(NTD)
by
remote
manipulation.
The
captured
samples
were
rapidly
identified
portable
mass
spectrometry
(MS)
within
minutes.
Rapid
various
including
toxicants,
chemical
warfare
agents,
burning
materials
from
was
successfully
achieved
robot-MS
system.
On-site
83
typical
examined.
Acceptable
analytical
performances
low
limits
(at
subng/mL
level),
good
reproducibility
(relative
standard
deviation
(RSD)
<
20%,
n
=
6),
excellent
quantitative
ability
(R2
>
0.99),
speed
(within
minutes)
also
obtained.
Our
results
show
system
has
performance
safety,
controllability,
applicability,
robustness
under
dangerous
conditions.
Green Analytical Chemistry,
Год журнала:
2022,
Номер
4, С. 100048 - 100048
Опубликована: Дек. 22, 2022
Solid
phase
microextraction
(SPME)
is
a
convenient,
effective
and
green
sample
preparation
technique,
offering
excellent
compatibility
with
different
chromatography
methods.
This
review
presents
an
overview
of
the
history
SPME
technique
its
early
adaptation
based
on
reported
patents,
followed
by
some
current
designs,
intended
usage,
especially
for
gas
(GC)
applications.
Particular
focus
quantification
approaches
in
included,
emphases
methodology
chosen
implementation,
correct
performance
validation,
calibration
method.
The
article
concludes
highlighting
innovative
SPME-related
techniques,
which
are
their
quantitative
coverage
analytes
Advances in Sample Preparation,
Год журнала:
2024,
Номер
10, С. 100111 - 100111
Опубликована: Март 16, 2024
Due
to
the
increasing
world
population
and
consumer
desire
for
sustainable
nutritious
protein
sources,
food
industry
is
currently
experiencing
tremendous
pressure
develop
innovative,
sensorially
acceptable,
health-promoting
plant-based
products.
Plant
proteins,
specifically
pulse
proteins
arise
as
a
healthy
source
applications.
However,
use
of
challenged
by
its
intrinsic
undesirable
aroma
often
described
beany,
grassy,
green.
These
off
notes
can
be
inherent,
i.e.
generated
from
plant
metabolism,
or
produced
during
processing
and/or
storage
encompass
broad
variety
chemical
classes.
Since
plays
major
role
in
acceptance
eating
habits
due
complexity,
proper
analytical
methods
must
used
assessment.
Considering
that
effectiveness
an
method
significantly
influenced
sample
preparation
step,
this
review
focuses
on
techniques
monitoring
volatile
profile
their
advantages,
disadvantages,
while
concurrently
highlighting
potential
novel
technologies
advancing
critical
application.
