eweiss Senior Member Joined: 5 Oct 2007 Posts: 67 Location: North Texas Expertise: I like coffee
Grinder: Starbucks Barista Burr
Posted Tue May 13, 2008, 10:28pm Subject: Re: Aerobie Aeropress - Good News On Bisphenol-A
Did the NDE lab tests check BPA when boiling water was used? I don't use boiling water, but what I do is:
Heat my water in my tea kettle.
When the sound changes so I know it's hot enough, I pour the hot water into the plunger up to about the (4) mark, and insert my digital thermometer. It usually reads a little over 180 degrees if I time it right.
When the temperature drops to 175 degrees, I pour the water into the outer tube that has my ground coffee in it (1-2 scoops, depending on how much coffee I want); I'll sometimes top off the water with a little more from the tea kettle, which has been off since I poured the water into the plunger tube.
I then stir it thoroughly with the paddle and let it sit for 10 seconds or so.
I then plunge it - with 2 scoops of finely ground coffee, this can take 30 seconds or so.
Will the hot water sitting in the plunger for the minute or more it may take to drop in temperature to 170-175 increase detectable BPA?
Posted Wed May 14, 2008, 7:49am Subject: Re: Aerobie Aeropress - Good News On Bisphenol-A
eweiss Said:
Did the NDE lab tests check BPA when boiling water was used? I don't use boiling water, but what I do is: Heat my water in my tea kettle. When the sound changes so I know it's hot enough, I pour the hot water into the plunger up to about the (4) mark, and insert my digital thermometer. It usually reads a little over 180 degrees if I time it right. When the temperature drops to 175 degrees, I pour the water into the outer tube that has my ground coffee in it (1-2 scoops, depending on how much coffee I want); I'll sometimes top off the water with a little more from the tea kettle, which has been off since I poured the water into the plunger tube. I then stir it thoroughly with the paddle and let it sit for 10 seconds or so. I then plunge it - with 2 scoops of finely ground coffee, this can take 30 seconds or so.
Will the hot water sitting in the plunger for the minute or more it may take to drop in temperature to 170-175 increase detectable BPA?
Hotter and longer might increase BPA. I do not know if the increase would result in detectable levels. For example some baby bottle tests which included sterilization in boiling water and warming the contents in a microwave oven have detected BPA, while others have reported "not detected".
For the NDE AeroPress test, the water was heated to 175F in a stainless steel electric kettle. That has become my favorite heating method when "instant hot water" is not available. I poke a small dial thermometer in the spout so it's easy to see when to switch off the heater. Of course, you could also nuke the water in a glass measuring cup if you are concerned about BPA. But I prefer the electric kettle because it's faster and quieter than the microwave oven.
Chingyul Senior Member Joined: 12 Jun 2007 Posts: 2 Location: Alberta, Canada Expertise: I like coffee
Posted Thu May 22, 2008, 10:31am Subject: Re: Aerobie Aeropress - Good News On Bisphenol-A
So I've managed to lose the "tube" portion of my aeropress. Is there anyway to purchase a replacement one, or do I have to buy the whole thing over again?
Just wondering, as someone who has only just begun making americanos since gettting my Aeropress (and unclear on how much water to add) - has anyone tried judging Brix in coffee using a tastevin?
BTW, I had occasion to go into two outdoor-supply stores yesterday - a high-end mountain equipment store and a utilitarian surplus-type outlet. The revolution in water bottles was remarkable. Metal only, except in the high end store where you could also get Camelbacks. The last time I'd been in there there had been whole racks of Nalgene, generic, and house-brand polycarbonate bottles. All gone.
Posted Fri May 23, 2008, 10:13am Subject: Re: Aerobie Aeropress - Americano
Hi Paul,
If you use one AeroPress scoop of fine grind per five ounces of diluted Americano, that's a Brix of 1.5, which is the SCAA Gold Standard of 1.25% TDS (total dissolved solids).
That's a good place to start and is what I most often drink. But I've posted here before that many AeroPressers like it stronger.
I never measure the water I add. I simply press into a mug, then add water to the desired level. For your two scoops I would press into a 10 oz mug, then top off with hot water.
If you want to be more precise (a.k.a. geeky) then I would suggest weighing everything. This is what I do so that I can get repeatable results everytime.
I won't give the whole ritual as it will bore you to tears but basically it's this:
1) Put mug with aeropress and funnel on to a gram scale (or if you prefer ounces, whatever). reset/tare to zero.
2) Add coffee, my case 15 grams. (just over half an ounce)
3) then add hot water until it reaches 265 grams. that is 60 grams/Litre (roughly the SCAA guidelines)
seeing that mililitres=grams it works really well. I also use this method for Chemex, vac pot and french press with great repeatable results. But Alan's suggestion will work fine, though it's not quite as geeky. I also use a thermometer in the Kettle (Alan does too!) as different coffees require different temperatures to taste their best.
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