RSC Advances,
Год журнала:
2023,
Номер
13(47), С. 33446 - 33452
Опубликована: Янв. 1, 2023
In
modern
society,
people
spend
most
of
their
time
indoors
engaging
in
work
and
home
life.
However,
indoor
air
pollution
is
a
potential
risk
to
health,
it
associated
with
many
diseases.
Wooden
furniture,
as
the
popular
furniture
used
times,
major
source
pollution,
so
has
become
imperative
explore
composition
release
kinetics
characteristics
toxic
hazardous
substances
from
wood-based
panels.
this
study,
thermal
desorption-gas
chromatography-mass
spectrometry
(TD-GC-MS)
was
detect
organic
compounds
wood
panels,
determine
dimethyl
acetal,
phenol,
toluene
decanoic
acid
via
bi-exponential
mass
transfer
models
provide
theoretical
basis
for
targeted
prevention
control.
project,
climate
chamber
method
conduct
120
h
continuous
sampling
concentration
The
TD-GC-MS
analyze
tubes,
concentration-time
data
were
fitted
models.
emission
factor
equation
obtained
model.
critical
physical
parameters,
such
initial
internal
C0,
diffusion
rate
Dm,
solid-phase/gas-phase
partition
coefficient
K,
Finally,
found
that
acetal
easily
rapidly
released
into
air,
while
phenol
slowly
ambient
air.
two
sets
an
essential
control,
well
methodological
path
studying
different
substances.
Abstract.
Proton-transfer-reaction
mass
spectrometry
(PTR-MS)
using
hydronium
ion
(H3O+)
ionization
is
widely
used
for
the
measurement
of
volatile
organic
compounds
(VOCs)
both
indoors
and
outdoors.
Unlike
more
energetic
methods
(e.g.,
electron
impact),
H3O+
can
leave
a
target
VOC
molecule
mostly
intact
thus
in
PTR-MS
spectrum
be
identified
by
its
mass-to-charge
ratio
corresponding
to
proton-transfer
product
(MH+).
However,
ionization,
associated
chemistry
reactor,
known
generate
other
ions
besides
product.
The
distributions
(PIDs)
created
during
include
resulting
from
charge
transfer
reactions,
water
clustering,
fragmentation,
all
which
create
ambiguity
when
interpreting
spectra.
A
standardized
method
evaluating
quantifying
possible
influence
PIDs
on
spectra
limited
part
due
an
incomplete
understanding
formation
mechanisms
effects
instrument
settings
measured
PIDs,
as
well
reasons
instrument-to-instrument
variability.
We
present
method,
gas-chromatography
pre-separation,
measurements
nearly
100
VOCs
different
functional
types
including
alcohols,
ketones,
aldehydes,
acids,
aromatics,
halogens,
alkenes.
Using
this
we
highlight
major
contributions
cluster
fragment
oxygenated
VOCs.
characterize
ion-molecule
reactor
conditions,
transmission
quadrupole
optic
tuning,
inlet
capillary
configuration
PIDs.
find
that
conditions
have
strongest
impact
but
voltage
differences
also
affect
Through
interlaboratory
comparison
calibration
cylinders
variability
PID
production
same
model
across
seven
participating
laboratories.
subset
laboratories
had
standard
deviations
(1
σ)
with
varied
no
than
20
%
providing
constraint
predicting
instruments
operating
under
conditions.
potential
misidentification
case
study
restroom
air.
propose
identifying
likely
constraining
Finally,
library
acquired
study,
publicly
available
updated
periodically
user-provided
data
continued
investigation
into
Abstract.
Proton-transfer-reaction
mass
spectrometry
(PTR-MS)
using
hydronium
ion
(H3O+)
ionization
is
widely
used
for
the
measurement
of
volatile
organic
compounds
(VOCs)
both
indoors
and
outdoors.
Unlike
more
energetic
methods
(e.g.,
electron
impact),
H3O+
can
leave
a
target
VOC
molecule
mostly
intact
thus
in
PTR-MS
spectrum
be
identified
by
its
mass-to-charge
ratio
corresponding
to
proton-transfer
product
(MH+).
However,
ionization,
associated
chemistry
reactor,
known
generate
other
ions
besides
product.
The
distributions
(PIDs)
created
during
include
resulting
from
charge
transfer
reactions,
water
clustering,
fragmentation,
all
which
create
ambiguity
when
interpreting
spectra.
A
standardized
method
evaluating
quantifying
possible
influence
PIDs
on
spectra
limited
part
due
an
incomplete
understanding
formation
mechanisms
effects
instrument
settings
measured
PIDs,
as
well
reasons
instrument-to-instrument
variability.
We
present
method,
gas-chromatography
pre-separation,
measurements
nearly
100
VOCs
different
functional
types
including
alcohols,
ketones,
aldehydes,
acids,
aromatics,
halogens,
alkenes.
Using
this
we
highlight
major
contributions
cluster
fragment
oxygenated
VOCs.
characterize
ion-molecule
reactor
conditions,
transmission
quadrupole
optic
tuning,
inlet
capillary
configuration
PIDs.
find
that
conditions
have
strongest
impact
but
voltage
differences
also
affect
Through
interlaboratory
comparison
calibration
cylinders
variability
PID
production
same
model
across
seven
participating
laboratories.
subset
laboratories
had
standard
deviations
(1
σ)
with
varied
no
than
20
%
providing
constraint
predicting
instruments
operating
under
conditions.
potential
misidentification
case
study
restroom
air.
propose
identifying
likely
constraining
Finally,
library
acquired
study,
publicly
available
updated
periodically
user-provided
data
continued
investigation
into
Atmospheric measurement techniques,
Год журнала:
2025,
Номер
18(4), С. 1013 - 1038
Опубликована: Фев. 27, 2025
Abstract.
Proton-transfer-reaction
mass
spectrometry
(PTR-MS)
using
hydronium
ion
(H3O+)
ionization
is
widely
used
for
the
measurement
of
volatile
organic
compounds
(VOCs)
both
indoors
and
outdoors.
H3O+
ionization,
as
well
associated
chemistry
in
an
ion–molecule
reactor,
known
to
generate
product
distributions
(PIDs)
that
include
other
ions
besides
proton-transfer
product.
We
present
a
method,
gas-chromatography
pre-separation,
quantifying
PIDs
from
PTR-MS
measurements
nearly
100
VOCs
different
functional
types
including
alcohols,
ketones,
aldehydes,
acids,
aromatics,
organohalides,
alkenes.
characterize
instrument
configuration
effects
on
find
reactor
reduced
electric
field
strength
(E/N),
optic
voltage
gradients,
quadrupole
settings
have
strongest
impact
measured
PIDs.
Through
interlaboratory
comparison
calibration
cylinders,
we
characterized
variability
PID
production
same
model
across
seven
participating
laboratories.
Product
was
generally
smaller
(e.g.,
<
20
%)
with
larger
contributions
>
0.30)
but
less
predictable
formed
through
O2+
NO+
reactions.
publicly
available
library
will
be
updated
periodically
user-provided
data
continued
investigation
into
instrument-to-instrument
Environmental Science & Technology Letters,
Год журнала:
2023,
Номер
10(11), С. 965 - 975
Опубликована: Март 10, 2023
Perception
of
odors
created
by
volatile
molecules
is
central
to
human
well-being.
The
chemistry
compounds
especially
important
inside
the
built
environment
as
humans
spend
increasingly
more
time
indoors.
However,
a
comprehensive
understanding
composition
and
behavior
indoor
semivolatile
(volatilome)
limited,
in
part
due
tremendous
complexity
fleeting
nature
these
chemical
distributions.
This
study
explored
volatilome,
opposed
individual
compounds,
residence.
We
mapped
spatial
distribution
volatiles
within
house
traced
corresponding
temporal
volatilome
changes.
Each
activity
generated
trail
volatiles,
after
habitation
was
found
be
distinctly
reshaped.
Using
molecular
networking,
we
how
multiple
families
were
affected.
portion
that
has
accumulated
occupancy
appears
harmful
health
than
emissions
from
itself.
an
consideration
for
any
other
with
chemistry,
such
hospitals
or
office
spaces.
A
known
strategy
for
mitigating
the
indoor
transmission
of
airborne
pathogens,
including
SARS-CoV-2
virus,
is
irradiation
by
germicidal
UV
light
(GUV).
particularly
promising
approach
222
nm
from
KrCl
excimer
lamps
(GUV222);
this
inactivates
but
thought
to
be
far
less
harmful
human
skin
and
eyes
than
longer-wavelength
GUV
(e.g.,
254
nm).
However,
potential
GUV222
affect
composition
air
has
received
little
experimental
study.
Here,
we
conduct
a
series
controlled
laboratory
experiments,
carried
out
in
150
L
Teflon
chamber,
examine
formation
oxidants
other
secondary
species
GUV222.
We
show
that
generates
ozone
(O3)
hydroxyl
radicals
(OH),
both
which
can
react
with
volatile
organic
compounds
form
oxidized
aerosol
particles.
Results
are
consistent
predictions
simple
box
model
based
on
photochemistry.
use
experimentally-validated
simulate
effect
under
more
realistic
scenarios,
spanning
range
ventilation
conditions.
demonstrate
some
conditions,
lead
levels
O3,
OH,
products
substantially
elevated
relative
normal
especially
when
low
intensity
high.
Thus,
should
used
at
lowest
intensities
possible
concert
ventilation,
decreasing
pathogens
while
pollutants
environments.
Environmental Science Processes & Impacts,
Год журнала:
2022,
Номер
25(2), С. 314 - 325
Опубликована: Дек. 7, 2022
Cooking
organic
aerosol
(COA)
is
frequently
observed
in
urban
field
studies.
Like
other
forms
of
aerosol,
cooking
emissions
partition
between
gas
and
particle
phases;
a
quantitative
understanding
the
species
volatility
governing
this
partitioning
essential
to
model
transport
fate
COA.
However,
few
cooking-specific
measurements
are
available,
COA
often
assumed
be
semi-volatile.
We
use
from
thermodenuder
coupled
an
chemical
speciation
monitor
during
HOMEChem
study
investigate
components
near-source
found
that
fresh
have
three
components:
biomass
burning-like
component
(COABBOA),
lower
associated
with
oil
(COAoil-2),
higher
(COAoil-1).
provide
characteristic
mass
spectra
profiles
for
these
components.
develop
describe
as
they
dilute
through
house
outdoor
atmosphere.
show
total
can
misclassified
air
quality
studies
semi-volatile
proxy
due
presence
substantial
bins
not
generally
represented
models.
Primary
thus
only
primary
sources
pollution,
but
also
compounds
undergo
secondary
chemistry
atmosphere
contribute
ozone
formation
aerosol.