(4) 12-Liter Distillation
(2) High Performance Liquid
Chromatographs (HPLC or LC)
Essential Oil Profiles
ASBC HOPS-17 method
Our laboratory has a comprehensive
QA program with regular state laboratory audits using U.S. EPA laboratory
standards. Since 2012, the laboratory has also subscribed to the monthly
ASBC QC Hops check samples. These are unknown single-blind samples that
rotate between hops, hop pellets, and hop extract. The program allows
us to compare our results with other labs and establishes verifiable
and accountable testing services. It also allows us to fine tune the
procedure so that our results fall near the laboratory mean.
|Note - When comparing your lab results, the method used and
moisture content should always be considered. Laboratory
round-robin tests show that the UV method has a positive
bias of a few tenths of a percent. Another huge factor is
moisture content (dry matter). Wet hops weigh roughly 5
times more than dried hops which makes a big difference
in lab results. We report the method, calculate results
for you both dried and wet, and include a free moisture
test as well.
Dried, wet, fresh, pellets, extracts...
what about moisture content?
Moisture content (also called dry matter) can be confusing. For
testing purposes, moisture content doesn't matter at all. We simply
report the test results of the sample "as received" in accordance with
standardized ASBC methods, as well as dried to the "ideal" 10% moisture.
That's important, because not everyone dries to the same moisture content,
and some don't dry at all. Some laboratories confuse the issue by reporting
results based only upon a back-calculated "ideal" 10% moisture. This
contradicts the ASBC lab methods, as well as the HOPS-1 "Sampling" method,
which have no provisions for drying the hops or reporting the hops in
any specific manner, other than the sample as it was received by the
laboratory. For these reasons, we include a moisture (dry matter) test
as a critical component of our analytical report. Our moisture test
allows back-calculations to any moisture content and we include the
calculated value on our
report as well as the mathematical
formula below. To convert your results to 10%
value x (90/(100-percent moisture))
as explained in this article from Michigan State
"Determining when hops are ready to harvest"
Also check out this
one from MSU:
"How to calculate alpha acid levels of hops before harvesting"
And this handy field calculator from
University of Vermont:
"Hop Harvest Moisture Calculator"
Long story short: It makes no difference to us what moisture
content your hops are - we've got you covered. If it's your goal
to have your testing reflect the highest possible alpha acids (roughly
5 times higher than wet hops), you can always submit hops that have
been properly dried. Just remember, wet hops degrade much faster than
dry hops. So time, temperature, and air exposure become more important
during transit to the lab. So for that reason, dried hops sent to the
laboratory can be advantageous if the shipping is delayed.
During the critical harvest
period of Aug. 1 - Oct. 15, lab reports are emailed:
within 1 business day for Hop
within 3 business days for Hop
within 5 business days for Hop
Essential Oils by GC (Hop Profile)
Samples analyzed at times other than
harvest can sometimes take up to 5 business days. If you need faster
turnaround, please call us and we'll try to accommodate your needs.
Sorry, but same-day test results is too disruptive to our production).
Our system will automatically send
you an email confirmation when your samples arrive at the lab. Your
analytical report will automatically be emailed as well, just as soon
as they are completed, before 6:00 p.m. on the due date.
How to sample and get them to us
Care should be taken to obtain
a representative sample of the bulk lot. For example, test results will
vary from the top to the bottom of the bine. Nitrogen-purging or vacuum
bagging in an aluminized Mylar food (barrier) bag is best, especially
to protect highly perishable wet hops. Otherwise, use new zip-lock sandwich
bags. Double bagging is recommended. Please contact us for a free sampling
kit which includes a Mylar barrier bag, instructions, the necessary
forms, and return packaging. It's not a requirement, but it's handy.
Hop acids: 30 grams (1.1 oz.) are
needed (about one full sandwich bag). Expel air and seal. Double bagging
is recommended when using zip-lock bags.
Hop Total Oils and Essential Oils:
100 grams (3.6 oz.) are needed (about 5 full sandwich bags). Expel air
and seal. Double bagging is recommended when using zip-lock bags.
Note: To delay formation of mold,
especially wet hops, keep the sample cool. Do not delay shipment to
the laboratory! Hops should arrive at the lab in two days or less for
the most accurate results.
Please note that lab results will not be disclosed until payment is
made. A delay of several days is possible if we must attempt to contact
you for payment. To avoid this delay, please prepay or include payment
with your hop samples.
Hop acids using HPLC (High Performance Liquid Chromatography)
offers superior quantitation, sensitivity, and additional speciation.
We use the American Society of Brewing Chemists (ASBC) HOPS-14 HPLC
method, the world-class standard. Alpha acids, Beta acids, Cohumulone,
Colupulone, and Moisture (dry matter) are included. $35
HOPS-6A + HOPS-12:
Hop acids using Scanning Diode Array UV Spectrophotometer and American
Society of Brewing Chemists methods HOPS-6A and HOPS-12. Alpha acids,
Beta acids, Moisture (dry matter), and HSI (Hop Storage Index) are included.
$35 per sample
HOPS-13: Hop Oils (Total
Essential Oils in Hops and Hop Pellets by Steam Distillation) according
to ASBC Method HOPS-13. A Moisture test (dry matter) is included.
(Note: You might consider doing HOPS-17 instead, which includes this
test). $25 per sample
HOPS-17: Hop Essential Oils
by Gas Chromatography using ASBC HOPS-17 method, also known as "oil
panel" or "profile". This test looks for certain components that contribute
to flavor and aroma characteristics. This is done using one our our
three dual Flame Ionization Gas Chromatographs (GC-FID2). Each instrument
provides two channels of data. Using two channels instead of one provides
confirmation of each compound's identity, an important quality control
measure not available at other hop laboratories. Your laboratory report
will list the percentage of each of the following key components described
this full length research paper: Myrcene (citrusy/grapefruit),
Humulene (citrusy, floral, woody, earthy), Farnesene, Caryophyllene
(herbal, spicy, woody), Linalool (floral, fruity), and Geraniol.
Also included in the price are: 1) "Total Essential Oils in Hops
and Hop Pellets by Steam Distillation" using method HOPS-13 and 2) moisture
(dry matter). $90 per sample
Click the photo
to see a Hop Laboratory Report
your samples, call us, or purchase online.
send out a sampling kit within one business day that includes
Mylar barrier bag(s), instructions, Hop Analysis Form, and
get an email when your sample arrives at the lab.
During the Aug.1
- Oct. 15 harvest season, your laboratory report will be emailed to you the next business
day for hop acids and HSI, within 3 business days for Hop
Essential Oils and within 5 business days for Essential
Oil Profile by GC. Please allow up to 5 business
days during other times of the year. Give us a call if you
need fast turnaround. We'll try to accommodate your needs.
acids by HLPC: Includes Alpha acids, Beta acids, Cohumulone,
Colupulone, Moisture (dry matter)
acids by UV: Alpha acids, Beta acids, Hop Storage Index,
Moisture (dry matter)
Essential Oils: Total Essential Oils in Hops and Hop
Pellets by Steam Distillation. A Moisture test (dry
matter) is included
Oil Profile by GC: Oil panel includes Myrcene, Humulene, Farnesene,
Caryophyllene, Linalool, and Geraniol. The $25 Total Essential
Oils test is included in the price as well as
Moisture (dry matter)
(1 to 3 days
in the continental USA, depending on distance)
with free pickup
Please note that lab results will not be disclosed until payment
is made. A delay of several days is possible if we must
attempt to contact you for payment. To avoid this delay,
please prepay or include payment with your hop samples.
CLICK HERE for Hop Analysis Form
Must be submitted with all samples!