Frequent Asked
Questions
1. Time to show
result: why some your tests don't show results as fast as the same tests from
another manufacturer?
2.
Why the
negative result test line intensity of some tests are weaker than the other
negative test line intensity?
3. Does adding more test sample make test result more
accurate?
4. What should we do to start a
drug test program?
5. What is a Cutoff?
-
Time to
show
result
is one of
the
qualities in
rapid tests.
The
requirement
is to show
test results
in 5
minutes.
Time to show
results vary
among
manufacturers
as well as
tests of the
same
manufacturers.
Our tests
might not be
the fastest
in the
market, but
they
definitely
aren’t the
slowest.
Besides
result time,
other
qualities
such as
precision
and accuracy
are
important as
well. Often
result time
and some
other
qualities
contradict
each other.
It is NOT
always good
to have fast
reaction.
All our
tests start
to produce
negative
results in
about 1
minute. They
meet the 5
minute assay
time
requirement.
-
Why the
negative
result test
line
intensity of
some tests
are weaker
than the
other
negative
test line
intensity?
About
line
intensity
In
certain
tests, line
intensity
contradicts
assay
sensitivity.
For example, high
test
sensitivity
is required
for
benzodiazepine
(BZD) test.
The negative
test line of
BZD test is
usually
fainter than
negative
test line
intensity of
other tests.
Even
the faintest
negative
test line in
our products
is sharp
enough to be
easily read
with the
naked eye.
It meets the
requirement
for line
intensity.
-
Does
adding more
test sample
make test
result more
accurate?
Some
customers
think the
more
specimens
they use in
a test, the
more
accurate
result they
can get. In
fact, that
is not true.
For example,
a
single strip
test
cassette
test
perform the
best with
two full
drops of
urine.
Too much
test sample
may flood
the test
reagent and
ruin the
test. Only
when
the flow
doesn’t show
at the
expected
flow time at
the result
window, it
means
the sample
volume is
insufficient.
Adding
another drop
of sample
should make
the test
work. Insufficient
sample can
occur due to
bubbles or
too small
drops.
-
We are
starting a
drug test
program,
how should
we start?
-
Rapid
tests
are
immunoassay
based
devices
for
on-site
testing.
Test
results
are read
within 5
minutes.
Rapid
tests
for drug
test
come in
several
formats.
Single
drug
tests
include
dipsticks
as the
simplest,
pippeting
cassette
type,
i.e.,
each dip
strip or
cassette
is for a
single
drug
test.
Multiple
/ combo
tests
are more
commonly
used
than
singles
in urine
screening.
-
Commonly
used
multiple
tests
are dip
cards
that
combine
2-10
tests on
one
card. To
use,
just
simply
dip the
sample
end into
urine
for
about 15
seconds,
negative
results
are
usually
read at
about 1
minute
and
positive
results
at 5
minutes.
-
An even
simpler
test is
a drug
test
cup,
which
has test
reagents
built in
the
urine
collection
cup.
Test
results
are read
off the
same
cup.
-
It is
important
that all
rapid
tests
are for
screening
only.
Presumptive
positive
results
need to
be
confirmed
by
another
method,
usually
GC/MS
analysis,
which is
available
at
toxicology
laboratories.
-
When
sending
a urine
sample
for
confirmation,
you must
know
that the
sample
has not
been
tampered
or
contaminated.
If a
test
strip or
dip card
has been
inserted
into the
urine
specimen,
the
specimen
is
considered
contaminated,
not
suited
for
confirmation
testing.
Therefore,
it is
important
to split
the
collected
urine
specimen
before
testing.
At least
one
fraction
of the
urine
specimen
is kept
clean at
all
time.
-
Acro
Biotech’s
CupLab
test cup
makes
drug
test the
simplest.
First,
the test
cup
contains
up to 12
tests
including
adulterant
identification
feature.
Secondly,
it is
the only
cup that
automatically
splits
urine
specimen
and
test.
Test is
usually
complete
when the
cup is
brought
out of
the rest
room
door.
Because
the
urine is
automatically
split
into two
chambers
within
the test
cup, no
manual
splitting
is
required.
The cup
containing
a clean
specimen
and a
test
result
can be
transferred
to a
toxicology
lab for
analysis.
The cup
comes
with a
non-leak
secure
screw
lid.
I recommend
you use 8
panel CupLab,
ref No 2136,
or
DipCard, ref
No. 2020,
device for
your
application.
The test
include the
following
drugs:
Amphetamine,
Benzodiazepines,
Cocaine,
methamphetamine
5. What is a
test cutoff?
A cutoff, or cut-off, of a
qualitative test method is the threshold level of the target substance that
distinguishes positive and negative results. For example, if a urine amphetamine
test has a cutoff of 300ng/ml, samples contain less than 300ng/ml amphetamine
should test negative and samples contain more than 300ng/ml amphetamine should
test positive. Our drug test pages list cut-off
levels of each drug test.
Learn more
|
|
|
