Hormonal
drugs
in
biological
samples
are
usually
low
concentration
and
highly
intrusive.
It
is
of
great
significance
to
enhance
the
sensitivity
specificity
detection
process
hormone
by
utilizing
appropriate
sample
pretreatment
methods
for
drugs.
In
this
study,
a
method
was
developed
effectively
enrich
estrogens
serum
combining
molecularly
imprinted
solid-phase
extraction,
which
has
high
specificity,
deep
eutectic
solvent-dispersive
liquid-liquid
microextraction,
enrichment
ability.
The
theoretical
basis
effective
solvent
also
computed
simulation.
results
showed
that
combination
extraction
microextraction
could
improve
HPLC
33~125
folds,
at
same
time
reduce
interference.
addition,
relatively
solvation
energy
estrogen
possesses
surface
charge
similar
estrogen,
thus
can
estrogen.
study
provides
ideas
separation
low-concentration
application
extraction.
Analytical Methods,
Год журнала:
2024,
Номер
16(38), С. 6460 - 6473
Опубликована: Янв. 1, 2024
Sample
pretreatment
is
one
of
the
key
steps
in
sample
analysis.
The
design
and
development
new
materials
promote
advancements
technology.
Deep
eutectic
solvents
(DESs)
are
a
novel
material
that
have
been
developed
recent
years.
They
possess
characteristics
such
as
low
toxicity,
good
thermal
stability,
simple
preparation
methods,
cost.
DESs
potential
to
replace
traditional
organic
extraction
solvents.
formed
from
hydrogen
bond
donor
(HBD)
acceptor
(HBA).
Changing
type
HBA
HBD
or
their
ratio
leads
variations
structure
properties
resulting
DESs.
Gas
chromatography
(GC)
gas
chromatography-mass
spectrometry
(GC-MS)
primary
analytical
techniques
used
laboratories.
This
paper
analyzes
selection
relationship
between
analytes,
well
pretreatment,
based
on
GC
instruments,
utilizing
DES
extractants
for
pretreatment.
summarizes
progress
DES-based
microextraction
methods
GC.
It
introduces
different
classifications
liquid
solid-phase
application
them.
theoretical
mechanism
extraction/separation
analyzed,
technology
discussed.
Molecules,
Год журнала:
2024,
Номер
29(15), С. 3661 - 3661
Опубликована: Авг. 2, 2024
The
advancement
of
traditional
sample
preparation
techniques
has
brought
about
miniaturization
systems
designed
to
scale
down
conventional
methods
and
advocate
for
environmentally
friendly
analytical
approaches.
Although
often
referred
as
green
strategies,
the
effectiveness
these
is
intricately
linked
properties
sorbent
utilized.
Moreover,
fully
embrace
implementing
methods,
it
crucial
innovate
develop
new
or
solid
phases
that
enhance
adaptability
miniaturized
across
various
matrices
analytes.
Graphene-based
materials
exhibit
remarkable
versatility
modification
potential,
making
them
ideal
sorbents
strategies
due
their
high
surface
area
functional
groups.
Their
notable
adsorption
capability
alignment
with
synthesis
approaches,
such
bio-based
graphene
materials,
enable
use
less
creation
biodegradable
enhancing
eco-friendly
aspects
towards
practices.
Therefore,
this
study
provides
an
overview
different
types
hybrid
graphene-based
well
applications
in
techniques,
focusing
on
offline
methodologies
stir
bar
sorptive
extraction
(SBSE),
microextraction
by
packed
(MEPS),
pipette-tip
solid-phase
(PT-SPE),
disposable
pipette
(DPX),
dispersive
micro-solid-phase
(d-µ-SPE),
magnetic
(MSPE).
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
9, С. 100605 - 100605
Опубликована: Дек. 30, 2023
Quinoline
(QN)
is
a
basic
nitrogenous
compound
normally
present
in
the
wastewater
from
petroleum
industry,
being
toxic
and
harmful
contaminant
of
emerging
concern.
In
contrast,
separation
methods
for
QN
capture
are
essential
an
economic
point
view,
since
quinoline
has
wide
range
industrial
applications.
This
work
aims
to
study
compare
application
two
graphene
oxide
(GO)
nanocomposites
-
oxide/agar
hydrogel
(GO/agar)
magnetic
(Mag.GO)
–
as
adsorbents
aqueous
quinoline.
For
Mag.GO,
Freundlich
isotherm
model
was
best
fitted
equilibrium
data,
GO/agar
all
models
experimental
data.
The
maximum
adsorption
capacities
were
approximately
25
mg
g−1
GO/agar,
53
Mag.GO.
increase
acetate
buffer
concentration
did
not
seem
significantly
affect
both
composites,
which
might
indicate
selective
QN.
Adsorption-desorption
tests
performed
with
HCl
NaOH,
efficiently
recovered
NaOH
each
case,
even
after
three
adsorption-desorption
cycles.
Although
phytotoxicity
assays
solution
still
indicated
effects
before
adsorption,
proved
be
good
removal,
Mag.GO
showing
greater
capacity.
