Journal of Chemical Education,
Год журнала:
2024,
Номер
102(1), С. 270 - 280
Опубликована: Дек. 13, 2024
The
academic
community
increasingly
embraces
the
possibilities
offered
by
Maker
movement,
with
a
notable
rise
in
creation
of
homemade
instruments,
particularly
field
spectroscopy.
These
instruments
are
being
leveraged
to
enhance
engagement
classes
and
educational
projects.
Most
these
designed
for
purposes
rely
on
simplified
3D-printed
components
and/or
adapted
materials,
such
as
compact
discs
used
diffraction
gratings.
This
article
proposes
yet
another
solution
recycling
an
optical
system
from
old
liquid
chromatograph
decommissioned
due
obsolete
communication
protocols.
entire
instrument's
is
used,
original
photodiode
array
(PDA)
was
replaced
modern
PDA
that
could
be
easily
controlled
Arduino
user
interface
developed
this
intent.
A
flowchart
illustrating
operations
related
absorbance
calculations
presented,
followed
discussion
how
shape
acquired
spectra
may
influenced
positioning
sensor.
raw
data
obtained
work
can
also
utilized
teach
concepts
dark
current,
baseline
correction,
instrument
calibration,
absorbance.
visible
several
substances
resultant
presented
compared
those
commercial
benchtop
spectrophotometer.
approach
described
here
inspire
recovery
other
outdated
providing
opportunities
explore
both
physical
computational
aspects
chemical
instrumentation.
Analytical Letters,
Год журнала:
2025,
Номер
unknown, С. 1 - 19
Опубликована: Март 5, 2025
Analytical
instruments
used
for
scientific
research
are
often
expensive.
This
limitation
poses
a
challenge
researchers
in
low-income
laboratories.
To
address
this
problem,
the
improvization
of
analytical
has
emerged
as
viable
solution.
Herein,
we
review
and
discuss,
step-by-step,
approach
using
smartphone
colorimetric
analysis,
known
digital
image
colorimetry
(SDIC).
With
its
practicality
accessibility,
SDIC
utilizes
cameras
acquisition
free
processing
programs,
Apps,
analysis.
By
leveraging
ubiquity
affordability
technology,
offers
an
accessible
cost-effective
to
resource-constrained
settings.
Analytical
instruments
used
for
scientific
research
and
education
are
often
expensive.
This
limitation
poses
a
challenge
schools
educators
in
low-income
countries
to
provide
practical
science
training
students.
To
address
this
problem,
the
improvisation
of
analytical
instructional
materials
has
emerged
as
viable
solution.
By
incorporating
experiments
into
education,
students
have
opportunity
engage
directly
with
instruments,
conduct
investigations,
collect
data.
hands-on
approach
fosters
deeper
understanding
principles,
enhances
critical
thinking
skills,
cultivates
mindsets
among
Herein,
we
review
discuss,
step-by-step,
using
smartphone
quantitative
analysis,
referred
digital
image
colorimetry
(SDIC).
SDIC,
its
practicality
accessibility,
utilizes
cameras
acquisition
freely
available
processing
programs,
such
ImageJ
Apps,
quantification.
Using
SDIC
can
enable
develop
essential
including
thinking,
data
interpretation,
an
evidence-based
research.
leveraging
ubiquity
affordability
technology,
offers
accessible
cost-effective
bridging
gap
between
theory
practice
resource-constrained
settings.
Journal of Chemical Education,
Год журнала:
2024,
Номер
101(9), С. 3891 - 3897
Опубликована: Авг. 12, 2024
A
multicomponent
reaction
was
adapted
and
successfully
applied
in
the
major
organic
course,
which
involves
synthesizing
characterizing
a
1,3-benzoxazine
derived
from
paracetamol
extracted
tablets
of
worldwide
well-known
medicine
Tylenol.
Using
as
reagent
is
motivational
strategy
undergraduate
laboratories
to
meet
learning
goals
training
students
solid–liquid
extraction
compound
characterization
by
NMR
FTIR
mechanism
discussions
context
reaction.
The
multifaceted
nature
this
experiment
encourages
recognize
potential
use
everyday
materials
chemical
reagents,
while
providing
insights
into
modern
chemistry
concepts.
Journal of Chemical Education,
Год журнала:
2024,
Номер
101(12), С. 5507 - 5515
Опубликована: Ноя. 21, 2024
In
this
study,
a
new
application
called
"Efficient
Colorimetry"
was
developed
to
measure
solution
concentration
using
digital
colorimetry.
This
app
is
integrated
into
the
WeChat
platform,
making
it
easy
use
on
smartphone.
The
includes
calibration
algorithm
that
establishes
standard
curve
by
solution,
which
used
prepare
solutions
of
increasing
incremental
additions
solution.
To
analyze
sample
concentrations,
takes
multiple
measurements
and
uses
linear
fitting
minimize
errors.
Additionally,
students
can
complete
assignments
provided
teachers
through
online
channels.
Forty-one
ninth-grade
determine
Fe3+
in
three
different
solutions,
demonstrating
app's
convenience
accuracy.
