Assessing the impact of RDT on espresso extraction
Does it make a difference? By Jeremy & Joe Download a PDF of this write-up here Download the data for this study here Goal: Assess the impact of RDT on espresso extraction Background: For years in coffee forums on the … Continued
Examining the Impact of the OCD (and OCD 2) on Total Dissolved Solids Extraction
Initially posted: 15 Dec 16 Updated: 22 Mar 17 Abstract The goal of this study was to explore the impact of the OCD distribution device on espresso as measured through total dissolved solids (TDS) extraction with a coffee-correlated refractometer (VST LAB … Continued
Exploring the Impact of Particles on Espresso Extraction
Initially posted: 01 Jun 16 Abstract This study had two goals: 1) explore the impact of uniform particle size on espresso extraction; 2) explore the impact of particle stratification on espresso extraction. The dependent variables collected were shot time and TDS. … Continued
Examining the Impact of Particulate Matter in Refractometry for Coffee Assessment
Main Questions 1) How does particulate matter affect refractive index (RI) measurements? 2) Do VST filters affect sample content (nondissolved solids or otherwise)? Abstract Nondissolvable, light-scattering solids (i.e., titanium dioxide, TiO2) were added, in increasing amounts, to various solutions. The … Continued
Comparing the Impact of Tamper on Extraction
Posted: 07 Aug 15 Edited: 08 Aug 15 Abstract The goal of this study was to examine the impact of particular tampers on espresso extraction. Our main objective metric was TDS assessed via two refractometers (VST LAB Coffee III and … Continued
The Impact of Tamping Pressure on Espresso Extraction
Posted: 28 Jul 15 Updated: 30 May 17 Abstract The goal of this study was to examine the impact of tamping pressure on espresso extraction. The main metric used was TDS assessed via two refractometers (VST LAB Coffee III and … Continued
Measuring Total Dissolved Solids: A Refractometer Comparison (Part III — Espresso & Filters)
Posted: 02 Jul 15 Updated: 08 Mar 16 Abstract Continuing with series on refractometer comparisons, the goal of this study was to examine the measurements from three refractometers advertised to measure the total dissolved solids (TDS) content of espresso. As … Continued
Looking at Burr Sharpness and TDS in Espresso
Abstract This experiment assessed differences in espresso total dissolved solids (TDS) as a factor of burr sharpness. Ten shots were pulled for each condition (sharp burrs, dull burrs) and TDS measured using an Atago PAL-COFFEE refractometer. Results revealed a significant … Continued
Measuring Total Dissolved Solids: A Refractometer Comparison (Part II)
Updated: 26 May 15 Abstract Continuing from our previous post on refractometer comparisons, the goal of this study was to examine the measurements from three refractometers advertised to measure the total dissolved solids (TDS) content of coffee. In three separate … Continued
Measuring Total Dissolved Solids: A Refractometer Comparison
Abstract The goal of these two studies was to examine the measurements from two refractometers advertised to measure the total dissolved solids (TDS) content of coffee. Utilizing mixed study designs, the VST LAB Coffee II Coffee & Espresso Refractometer (the … Continued