Keys to successful sample submission at Core Enology

Wine Samples:
~ 50mLs is all it takes:  All analyses performed at Core Enology can be run off a single 50mL sample tube.

~ Minimize headspace:  To help ensure sample integrity and adequate volume for analysis please fill the 50mL tube all the way to the top. (Our red-cap tubes are much less prone to leakage than other tubes out there.)
~ Beware of cross-threading: When capping the tube make sure it hasn’t been cross-threaded. Cross-threading pretty much guarantees leakage.
~ Print neatly:  Taking the time to write the id of each sample as clearly as possible on our pre-printed sample labels will minimize the amount of guesswork at login
~ Keep samples cool:  During the summer months especially, it doesn’t take long for samples to warm up in a hot car, possibly shifting volatile parameters like FSO2 and alcohol. Consider a cooler/cold pack to help keep your samples cellar fresh.
~ Shipping samples by UPS or FedEx:  Even for wineries that are relatively close to the lab, shipping samples by UPS or FedEx can be a great option. It’s generally best to minimize the amount of time samples spend in transit – next day delivery is generally best. (Check UPS/FedEx coverage maps to see if your winery is next day by Ground.)

Juice Samples:
Fresh samples are very much preferred. That said, it’s important to avoid fermentation in the tube. Samples that arrive actively fermenting are problematic from both a sample prep/analysis and a sample integrity standpoint. Here are some suggestions for submitting juice samples:
~ Minimize holding time: Get samples to the lab ASAP after collecting them.
~ Avoid inadvertently cold stabilizing your samples:  Juice samples that get put in a fridge or freezer are likely to precipitate potassium tartrate crystals.  When this happens the acid-related parameters of the juice panel can be significantly impacted - potassium, tartaric acid, and titratable acidity can all see dramatic decreases. (Please note:  Frozen or refrigerated juice samples will be subject to a prep fee of $5/sample)
~ Fresh samples = faster turnaround:  Samples that have been refrigerated or frozen require heating to resuspend tartrates.  This additional sample prep step will lead to a delay in getting results back to you.

~ Worried about your sample fermenting?  If you’re concerned that your sample might ferment in the tube, we suggest boiling the sample rather than refrigerating or freezing.  Follow these simple steps:

  • Clarify the juice sample as much as possible
  • Decant clarified sample into a 50mL tube
  • Loosen cap to allow venting but make sure it’s still threaded – very important!
  • Microwave until sample just starts to boil, approx 20-30 seconds/tube
  • Stop microwave, tighten cap, give it a good shake (careful, juice will be hot!)
  • Sample should now be stable at room temperature until delivery to the lab
  • Don’t use an ice pack with boiled samples!!! (If samples arrive with an ice pack we will re-boil them.)

Questions?  Don't hesitate to reach out to us, we're happy to guide you through the sample submission process.