Conversion math question: final concentration

[Daniel11]

Ok so I just made a batch of Test Cyp.

Plan: 300ml total using 100g Raws. 2/18 BA/BB. MCT oil as carrier.

Using BKs calculator I used 0.909 for powder displacement.

Measured everything carefully, cooked it, filtered it using a bottle top filter into a single media bottle and separated into 10ml vials.

I was expecting to end up with 30vials (all things being perfect).
I only ended up with 26.5 ish vials.

What does that make the concentration now? 377mg/ml?

What is the most common cause for this loss of yield ? I expected a little but not 35ml of loss.

 

[Ironbuilt]

Oh Daniel....how the dang heck can we know u did the math right on your percentages / ml amounts son... be more specific will ya..? Lol....whats the mg per ml u went for.?

 

[Ironbuilt]

Ok.so don't answer.. for 300mg/ml. U get 33 / 10ml ( 3 grams of raw for each 10ml) hense 99grams.

250mg/ml u get 40 vials of 10ml/ 250mg per ml..( 2.5 grams
per 10 ml)

Smell what the rocks cookin yet?

 

[Ironbuilt]

I'm saying mil /chem count off when making.

 

[Daniel11]

IB - I used the calculator on BKs site.
Never mind that. The calculations are legit for 300ml.

I went for 333.33 mg/ml
That's 300 ml total using 100g Raws
100g/300=0.333g/ml

300ml into 10ml/vial = 30vials

Actual resulting yield was only 26.5vials
265ml using 100g Raws
100g/265=0.377g/ml

Is this not correct?

 

[Daniel11]

Here is the calculator with values

 

[Daniel11]

Since the final yield is less than 300 does that change the concentration?
Or does it mean I actually lost 35ml of final product in the process? As in cumulative loss from filtering, transferring to vials, transfer from beaker to filter etc.

Another possibility, is that the Raws where not pure so 0.909 as displacement may have not accurately reflected the Raws as it should have? This could throw the total yield off, but not by 35ml.

 

[Ironbuilt]

So bk is 299.10 ml adding up the figures - displacement to mil.
You got 265 mil which is 34ml off if the displacement is correct.
You sure u used correct amount in your measuring?
Thats way too far off the mls .
Raws purity is probably the reason or error on your mil of fluids.
Do you use a ml dispenser or do it syringe by syringe to add the carriers and chems? How u filtering ?..
What made u want to make it 333mg/mil?.

 

[Daniel11]

333 because I got a deal on 100g Raws. Also 3cc makes 1g.

I used 20ml syringe for measuring.
Used a bottle top filter. Filtered all 300ml at once into a single media bottle Used 20ml syringe to transfer to each vial.

 

[Daniel11]

It's not the 1st time I have seen a reduced final yield after using these same steps, even with other compounds.

Even using 0.85 for displacement value compared to .909 at 100g Raws would only be a difference of 6ml. Then some loss in the filter, oil left over on Alanise of beaker, filter top container, media bottle.

Wonder if I am slightly over filling the vials?

 

[Ironbuilt]

Wonder if I am slightly over filling the vials?

How could you do that D? With 20ml it's 20ml. Has to be raw purity brother . So you are doing 3cc all at once one day? How many times a week?

 

[Nattydread]

Daniel I don't want to jack your thread but I'm bout to start my first real brew and what IB said about raw purity gots my mind going.

So if purity is off that means your yield is less??

 

[Daniel11]

IB - I would do 1.5 at one time. 2x a week. Or 1cc 2x. Depending on how high I want to run.

I am pretty certain that I am measuring correctly. I mean it's not rocket surgery here measuring 20ml in a syringe and putting 10 in one and 10in another.


@Natty - when calculating the ml displacement that a powder makes it's based on ml/mg of Raws. This value is generated from pure Raws. If the Raws are not 100% pure then the displacement may not be exactly as expected. This will throw off final measurements.

Although one would assume that at 95% + (even 90%) purity it should be negligible, and not nearly what I experienced.

 

[Nattydread]

Ahh. Got it Daniel. Thank you

 

[Ironbuilt]

Ahhh. Ok..
Natty so this is the big year huh? Kool.
Wonder if I am slightly over filling the vials?

Where'd I read that before? Who said it? Lol.. Just fill the bitch up And shoot..let us know pip action Thks