30 ML Home brew bottle

26.5 ML - Perfumer's Alcohol SDA 40b
3 ML - DPG
.5 ML - Androsterone-S

Using your formula and assuming my spray top is putting out 140 ul, I'm getting roughly around 5 2.5 mcg per spray

With the help of this thread, I made my homebrew. Only thing that prevented me from doing it sooner was getting the PA as I'd rather not use lower grade alcohol.

I might try and make a 10 mcg silk base version but I'm learning that it is a little tricky to play with. Might go for a Isopropyl Myristate version instead.

Fly So Hi, thanks again man.

Thank you!

Glad to see my work is helping people. I'm sorry for not having answered the oil-base question before. I really had not thought about it. You said you got your answer so, if you could point out where it is, I'd be grateful.

Tks!

EDIT: By the way, I use THESE bottles:


You can see that the info on it says: "Atomizer Dispensing Amount: .14cc" (CC stands for cubic centimeters, another word for ml).

These atomisers seem to be the standard in the phero industry now. That's why I calculate 140uL.

EDIT 2: THey've updated the dispensing amount for 160uL now. Maybe it's a different manufacturer, so consider that when mixing your mixes.

(02-27-2012 7:07 PM)Fly So Hi Wrote:  Hello pherotruthers! This is a long and boring post, so only read it if you need it.

Thought I would write a comprehensive guide for those who want to dissolve their molecules or make their own mixes. We're going to broach the dilution of one single molecule first. We need three basic materials:

• Carrier
• Fixative (usually 10%)
• Concentrate
  

Those are the basic components in any pheromone blend. Of course, essential oils or scents can be added as well.
You can mix everything using a 1ml syringe for the concentrate and two 5ml syringes: one for the fixative, one for the alcohol. It is very useful if you have a micropipette, especially if you're going to be working with dosages on the nanogram (nG) scale. When working with micropipette, you must use one tip to each component. So...



To avoid cross contamination, the ideal is to use one syringe per component, be it DPG, alcohol, molecule, essence, or other. You can buy packs of ten 1ml syringes in drug stores, and label them with the component names they were used for, so you can reuse them. They're generally used by people with diabetes to apply insulin. To work with the DPG, use a 5 ml syringe, once the liquid is thicker and needs a larger needle to be sucked in.


Note:
If you think one of the syringes or other pieces of equipment were contaminated or are dirty in any way, boil water and dive the equipment into it for a few minutes. You can also use a pressure cooker to make it closer to the real autoclaving process.


If you want to use volumetric flasks, beakers and graduated cylinders, it's great. Just remember you can mix all the components in the bottle they will go in.

It's also a good idea to use gloves and a mask.


Has no money for a micropipette, must be a Weasley.


Okay, so first we need to decide how much mass of a molecule (M) we want to dispense per application. That's the dosage in micrograms per spray, or dabs, or whatever. The amount of concentrate that must be used for the desired dosage to be dispensed can be determined through the following equation:





Or put more readable:





Vc "“ Volume of concentrate in microlitres.

M "“ Mass of molecules (the desired dosage per spray) in micrograms.

Va "“ Volume of application (drop, spray, dab or inch) in microliters. As a rule of thumb, one dab is 20 μl, one drop is 50 μl and one spray is 130 μl.

Vb "“ Volume of total bottle content (volume of the carrier [alcohol, oil, silicone] plus fixative [DPG, silicone] plus the concentrates) in microlitres.

K "“ Concentration of concentrate, in milligrams per millilitre.


So we'll dilute some alpha-androsterone, into a spray bottle type. The total amount of liquid inside the bottle is 15 ml, so Vb=15000. We want a dosage (M) of 1,25 mcg/spray. My concentrate is diluted in alcohol, at 2mg/ml concentration (K).

A spray can vary from 80 to 140 μl, or 0.08 to 0.14 ml. For this example, assume 1 spray (Va) = 140 μl.





Using combinatorial proof:





Okay. So we're going to need 67 μl of concentrate to dispense the intended dosage. We are aiming for 15ml of total content. 10% or 1,5ml of it is fixative. 0.67 of it is the actual concentrate. So we take 15ml minus 1,5ml minus 0.67ml and we have 12.83, the volume of alcohol we need to complete the process.





Vr "“ Volume of carrier.
Vb "“ Volume of total bottle content.
Vf "“ Total volume of fixative, in millilitre.
Vc "“ Volume of concentrate.


In case you are mixing a blend, calculate how much concentrate you're going to need for each molecule and sum them up to use as Vc before using the above equation.

The rest is quite simple now. Just add everything together and shake the bottle. Label it with component name and dosage per spray, or dab, or inch, whatever you"˜ve chosen your dosage method to be. To minimise evaporation of components, it is best to add into the bottle the fixative first, then the carrier, then the concentrate. Let it rest for a day in a cool, dark place.

Sucking the DPG should be quite hard at first, because it is really thick. But you'll soon get used to it. (Wait, that could've come out wrong...)



EDIT: Corrected misspelled measures and formulas.

This is really awesome, thank you for this.
I just wanted to ask, the amount of pheromones works out to 0.67ml. I just want to check is it not 0.067ml. (ul as 1ml = 1000ul.) Sorry just abit confused about the ul to mcg conversion.

Also to mix this in a 50/50 alcohol to oil base, what would you recommend the increase should be?

AWESOME post, thanks!

Thanks for the compliments! I'm glad you liked it.

Very well. As you can see in the first formula, Vc is measured in microlitres.

Microlitre = uL.

Once, as you've correctly stated, 1 mL = 1000 uL...
then 0.67 mL = 670 uL.
And 0.067 mL = 67 uL.
And 0.0067 will be 6.7 uL.
And 0.00067 will be 0.67 uL or 670 nL. That is six-hundred and seventy nanolitres.
And so on, and so forth.

Now I don't have a rule of thumb for the increase in pheromones concentration in a mix, according to the carrier you're using. I know that for that ratio, the diffusion will be more linear along time, against a pure alcohol carrier, which would have a more "spiked" profile/diffusion curve. More or less like this:


Alcohol carrier


DPG carrier

Anyway, this thread can give you a hint:

https://pherotruth.com/Thread-Pheromones...7#pid36707


Cheers!

(10-14-2013 1:01 PM)Fly So Hi Wrote:  Thanks for the compliments! I'm glad you liked it.

Very well. As you can see in the first formula, Vc is measured in microlitres.

Microlitre = uL.

Once, as you've correctly stated, 1 mL = 1000 uL...
then 0.67 mL = 670 uL.
And 0.067 mL = 67 uL.
And 0.0067 will be 6.7 uL.
And 0.00067 will be 0.67 uL or 670 nL. That is six-hundred and seventy nanolitres.
And so on, and so forth.

Now I don't have a rule of thumb for the increase in pheromones concentration in a mix, according to the carrier you're using. I know that for that ratio, the diffusion will be more linear along time, against a pure alcohol carrier, which would have a more "spiked" profile/diffusion curve. More or less like this:


Alcohol carrier


DPG carrier

Anyway, this thread can give you a hint:

https://pherotruth.com/Thread-Pheromones...7#pid36707


Cheers!

Thank you, very awesome way of putting it into perspective, cleared it up for me.!
Awesome work!

Anyone can explain why concentration mcg per spray is matter ?
instead of mg/ml ?

(06-23-2022 11:25 PM)StayFreeze Wrote:  Anyone can explain why concentration mcg per spray is matter ?
instead of mg/ml ?

When you use pheromone colognes, every time you press the spray pump or drop a drop of it in your finger to rub on your neck, you dispense very tiny ammounts of whichever molecules are in its composition, in the range of micrograms. Some molecules are so powerful they only need nanograms to have their effect.

When you talk milligrams per ml, you're talking units of measure that are not used in the application of pheromones, as you only dispense micrograms of molecules through microliters of liquid (the vehicle). It's like going to the gas station and asking for 5 drums of gasoline. That's not comsumption quantity, that's storage quantity. Consumption quantity is measured in liters or gallons, as you cannot put a whole drum of gasoline in your tank.

One actuation of a pheromone bottle spray pump dispenses around 150 microliters of liquid, so if you know the weight of pheromones contained in 1 ml, you can find how much will be dispensed by the Rule of Three.
In general, one dab is 25 microliter, one drop is 50 microliter and one spray is 150 microliter.


EDIT: I'll fix this post when I have time. Images all disappeared as tinypic went offline.