Results for all Ward Lab mineral analyses can be downloaded here: https://docs.google.com/spreadsheets/d/1Ye9hxQobCQfzJ7zKAaAYJwyQ–n-HLR3-XsiLhCwHOE/edit?usp=sharing
After verifying the consistency of Tree House Julius from batch-to-batch, I set out to determine the consistency of Tree House IPAs from brand-to-brand.
Thanks to Tom’s generous August beer mail, I shipped cans of Green, Doppelgänger and Haze to Ward Lab on 8/20/2020 for mineral analyses.
WARD LAB W-501 BREWER’S TEST RESULTS
|Total Dissolved Solids (TDS) Est, ppm||1816||1853||1847|
|Electrical Conductivity, mmho/cm||3.03||3.09||3.08|
|Sodium, Na ppm||33||44||35|
|Potassium, K ppm||1317||1592||1316|
|Calcium, Ca ppm||38.6||104.2||61.3|
|Magnesium, Mg ppm||150||187||161|
|Total Hardness, CaCo3 ppm||723||1039||823|
|Nitrate, NO3 ppm*||77||101||4|
|Sulfate, SO4 ppm**||393||444||405|
|Chloride, Cl ppm||393||461||405|
|Carbonate, CO3 ppm||< 1.0||< 1.0||< 1.0|
|Bicarbonate, HCO3 ppm||323||329||348|
|Total Alkalinity, CaCO3 ppm||265||269||286|
|Total Phosphorus, P ppm||385.60||452.00||442.00|
|Total Iron, Fe ppm||0.10||0.15||0.04|
**multiplied by 3 to convert to SO4
|Mean + SD|
|Alc. by vol %||6.8||6.8||7.5||8.0||8.2||7.5 + 0.7|
|pH||4.6||4.6||4.7||4.7||4.7||4.7 + 0.1|
|Calcium, Ca ppm||64||57||39||104||61||65 + 24|
|Magnesium, Mg ppm||185||137||150||187||161||164 + 22|
|Sodium, Na ppm||32||34||33||44||35||36 + 5|
|Chloride, Cl ppm||299||376||393||461||401||386 + 58|
|Sulfate, SO4 ppm**||474||354||393||444||405||414 + 46|
To more closely compare the five Tree House IPAs, I calculated the mean and standard deviation for ABV, pH, calcium, magnesium, sodium, chloride and sulfate. While most samples fell within one standard deviation of the mean, some didn’t; Green and Doppelgänger fell outside with respect to calcium, Julius 2020 and Doppelgänger fell outside with respect to magnesium, Doppelgänger fell outside with respect to sodium, Julius 2019 and Doppelgänger fell outside with respect to chloride and Julius 2020 fell outside with respect to sulfate. In other words, besides Doppelgänger, the Tree House IPAs are relatively consistent.
So what’s next?
I plan to have Trillium Congress Street and Double Dry Hopped Fort Point and Russian River Pliny The Elder analyzed next week. These beers will allow me to compare different breweries and different styles to help me make the most informed decision on target minerals.