Australian Stonefruit Grower Magazine Issue 2 August 2016 | Page 40
Research
DETERMINING THE SAMPLING JAR VOLUME
This is done by weighing the total amount of water
required to fill both base and lid of the chamber. This
should only need to be done once for each chamber.
While the totals will be similar for most of the
chosen chambers sometimes there are differences
large enough to alter the results so it is important to
do this for every chamber used.
EQUIPMENT:
1. a balance or set of scales, accurate to 0.1 g is
preferred
2. worksheet
STEPS:
1. Record the chamber and lid labels.
2. Separate lid from base of chamber.
3. Place base and lid on the balance and record the
weight.
4. Remove the lid, pour water into the base until
is completely full (to the brim); try to avoid any
spillage onto the scales as this will add to weight.
Replace the lid upside down on top of the base
(still containing water) and fill the lid with water.
5. Record the total weight (base and lid).
6. Repeat from step 1 for all remaining chambers.
Download
Jar volume recording sheets
7. Record this value for the specific chamber and
keep this information for reporting with the
sample information each time the chambers are
used.
See video:
How to determine the volume
of the sampling jar
Acknowledgement
The procedure was developed as part of the project
SF15001 “Comparing Stonefruit ripening, quality and
volatile composition” which is funded by Horticulture
Additional information
At the time of writing, the cost of the ethylene analysis per
cultivar is estimated at $1,250 including supply of syringe,
needles and pre-evacuated vials but not the chambers.
Innovation Australia Limited using the summerfruit
levy and funds from the Australian Government with
co-investment from the Department of Economic
Development, Jobs, Transport and Resources.
The DA-Meter can be sourced through Summerfruit
Australia Limited.
Growers or organisations interested in the identification
40
The full downloadable protocol with explanatory videos
of maturity classes should contact Dr Dario Stefanelli
can be also found on the Horticulture Industry Network
([email protected]) or Mrs Christine
website http://www.hin.com.au/projects/stonefruit-
Frisina ([email protected]) at AgriBio
field-laboratory/da-meter/ethylene-sampling-
building, 5 Ring Road, Bundoora, VIC 3083.
protocols/_nocache
Australian Stonefruit Grower | august 2016
summerfruit.com.au