ULTIMATE COFFEE REFRACTOMETER SHOWDOWN (Plus Methodology and Best Practices)

Refractometer best practices, explanation of TDS and EY, and a refractometer showdown. What more can you want as a coffee nerd? Why is the VST my baseline? Here is an independent study showing the VST is at most at .03% accuracy vs. over drying: https://www.nature.com/articles/s41598-021-85787-1 Scroll to the supplementary info and see Supp Fig 3! (here is a link- https://static-content.springer.com/esm/art%3A10.1038%2Fs41598-021-85787-1/MediaObjects/41598_2021_85787_MOESM1_ESM.pdf ) TIME CUES BELOW Thank you for watching! Please consider subscribing if you have yet to do so. Every bit of interaction helps fuel both this channel monetarily but myself motivationally. Thank you Jonathan Gagne for the help creating the graphs and to my discord for giving me some company while brewing and measuring. Find data and graphs here- https://www.dropbox.com/sh/yonpqn2cmauzkpu/AADJiL6rypTTz_X8lXqz3RUMa?dl=0 QUICK NOTE- I actually took 10 samples of espresso, not 5. I did 5 more after filming to match the 10 for filter. If you'd like to BUY an Atago or Difluid, please consider using the following links if and only if you are planning on using amazon. Personally, I would prefer you find another means to obtain these pieces of equipment, if you are going this route, I'd appreciate taking a bite out of their apple. I get a small commission on any purchases made with them. I also have an amazon storefront wherein you can buy most anything through it and I'll receive some kickback. Again, only if you aren't able to find them at local shops or reputable resellers. Thanks! Atago- https://amzn.to/3TlhQxo "Yellow Boi"- https://amzn.to/3PWlV84 DiFluid- https://amzn.to/3RhKRIw My storefront: https://www.amazon.com/shop/lancehedrick __________________ Join my Patreon community at: https://www.patreon.com/lancehedrick Find me on IG at: https://www.instagram.com/lancehedrick Find me on Facebook at: https://www.facebook.com/lancehedrickcoffee __________________ Watch JKim Makes Aforementioned Video: https://youtu.be/WSWBbzPh7dM Jonathan Gagne on Refractometry: https://coffeeadastra.com/2019/02/20/a-more-accurate-way-to-calculate-average-extraction-yield/ https://coffeeadastra.com/2019/02/17/measuring-and-reporting-extraction-yields/ https://coffeeadastra.com/2019/09/21/measuring-coffee-concentration-with-a-0-01-precision/ Scott Rao on Refractometry: https://www.youtube.com/watch?v=400xnQD9NHw https://www.youtube.com/watch?v=tiqjf8-yuR4 https://www.instagram.com/p/BsGWKtRlz0b/?utm_source=ig_embed&ig_rid=15e0ccdc-6817-4a6c-8b7c-c38797d6d255 A Waste of Coffee Guide: https://awasteof.coffee/how-to/measuring-extraction/ https://awasteof.coffee/2019/02/24/new-refractometer-guide/ Calculator: https://awasteof.coffee/tools/universal-extraction-calculator/ Precision notes from VST: https://cdn.shopify.com/s/files/1/0092/7622/files/VST_LAB_Coffee_PRECISION_Notes.pdf?332670224803473370 https://cdn.shopify.com/s/files/1/0092/7622/files/Coffee_and_VST_Refractometers.pdf?128 0:00- Introduction 3:40- TDS and EY Defined 6:47- Percolation Equation 10:00- Immersion Equation 11:19- Mixed Methods Equation 13:21- LRR and Interstitial 16:13- Methodology 22:43- Digression 1 on Distilled vs Brew Water 23:47- Methodology cont'd 27:41- Digression 2 on Mushrooms 31:21- SHOWDOWN 38:18- Results 42:27- Concluding Thoughts Thanks to the following! Track: Phoria — Metro Vice (ft. Dubfest) [Audio Library Release] Music provided by Audio Library Plus Watch: https://youtu.be/yJOSrV4zEBw Free Download / Stream: https://alplus.io/phoria