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Old 04-26-2012, 07:56 AM   #1
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Dilution Ratios

What is the correct way to calculation dilution?


For example, if the label calls for 1:10 dilution is it:
1 part "x" and 9 parts “y”
Or
1 part “x” and 10 parts “y”

I tried looking this up on the internet but people seem to be slip on it.
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Old 04-26-2012, 08:09 AM   #2
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For a 1:10 it's 1 part X and 9 parts Y
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Old 04-26-2012, 08:21 AM   #3
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Quote:
Originally Posted by stieger View Post
For a 1:10 it's 1 part X and 9 parts Y
That's what I "thought" but doing some reseach seems that "might be" incorrect. Think about it, what would 1:1 be and how would it differ from 1:2 if we went by the above?

It's driving me nuts!
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Old 04-26-2012, 08:28 AM   #4
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Trust me. It's 1 part X and 9 parts Y. I've spent the last year and a half doing research for my thesis. I did a LOT of solutions in that time.
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Old 04-26-2012, 08:39 AM   #5
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Quote:
Originally Posted by stieger View Post
Trust me. It's 1 part X and 9 parts Y. I've spent the last year and a half doing research for my thesis. I did a LOT of solutions in that time.
Thatís good to know.

Just so we are on the same page, letís assume we needed 128oz diluted 1:4. This would be 32oz of "x" and 96oz of "y" correct?

Here is why I started to get confused. If a product says add 1 part solution to 3 parts water that would be different then 1:3 correct? Because in this case it actually spelling out the ratio. Correct?

Thanks as always!
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Old 04-26-2012, 08:46 AM   #6
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When someone tells u to do 1:10 it means that u need 10 Y for every 1 X. For a total of 11 parts
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Old 04-26-2012, 08:48 AM   #7
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Quote:
Originally Posted by camarograna2 View Post
When someone tells u to do 1:10 it means that u need 10 Y for every 1 X. For a total of 11 parts
And here in lies the confusion!
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Old 04-26-2012, 08:49 AM   #8
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: equals to. It's not complex. One to ten!
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Old 04-26-2012, 09:04 AM   #9
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Quote:
Originally Posted by camarograna2 View Post
: equals to. It's not complex. One to ten!
Well at this point we seem to be 50-50 on this thread.
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Old 04-26-2012, 09:24 AM   #10
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For our chemicals and the products we sell we recommend following the dilution ratios exactly.

For example if something is 10:1, then you would use 10 parts water and 1 part solution, thus yielding 11 parts.

We sell over 60 brands of car care products and this recommendation IME is universal.

For example, Meguiar's Glass Cleaner Concentrate dilutes 10:1. The total yield is 11 gallons according Meguiar's.

BLACKFIRE All Purpose Cleaner dilutes 4:1. The total yield is 5 gallons of APC when diluted.

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Old 04-26-2012, 09:53 AM   #11
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Doing 1 part X and 10 parts Y gives you a ratio of 1:11

Here's how you calculate a ratio

(amount of X) / (amount of X + amount of Y)
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Old 04-26-2012, 10:00 AM   #12
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Quote:
Originally Posted by stieger View Post
Doing 1 part X and 10 parts Y gives you a ratio of 1:11

Here's how you calculate a ratio

(amount of X) / (amount of X + amount of Y)
Take a look at the below link. The dilution rate is 1:10 but it does in fact say it will make 11 gallons. So this then means it is 1 part "x" to 10 parts "y". Had it been 1 part "x' and 9 parts "y" you'd only get 10 gallons.

http://www.autopia-carcare.com/megui...ncentrate.html

I'm glad I'm confused for a reason
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Last edited by nyrfan; 04-26-2012 at 10:10 AM.
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Old 04-26-2012, 11:41 AM   #13
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Quote:
Originally Posted by stieger View Post
Doing 1 part X and 10 parts Y gives you a ratio of 1:11

Here's how you calculate a ratio

(amount of X) / (amount of X + amount of Y)
From a percentage standpoint yes. But when discussing dilution rations 1:10 means dilute 10 parts of x with 1 part of y.

10:1 doesn't mean 100 percent/10 percent, it means 10 parts + 1 part. In terms of percentages it would be more like 90.91 percent/9.01 percent.

Dilluting something 10:1 gives it a dilution of 90.91:9.01.
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Old 04-26-2012, 12:27 PM   #14
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i love math .lol
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Old 04-26-2012, 12:32 PM   #15
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Quote:
Originally Posted by Todd@Autopia View Post
From a percentage standpoint yes. But when discussing dilution rations 1:10 means dilute 10 parts of x with 1 part of y.

10:1 doesn't mean 100 percent/10 percent, it means 10 parts + 1 part. In terms of percentages it would be more like 90.91 percent/9.01 percent.

Dilluting something 10:1 gives it a dilution of 90.91:9.01.
OK. I give up. I just know that when I had to do serial dilutions on my cells it was 9 parts KK2 buffer and 1 parts cells. But I 'm honestly starting to get confused.
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Old 04-26-2012, 12:50 PM   #16
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OK. I give up. I just know that when I had to do serial dilutions on my cells it was 9 parts KK2 buffer and 1 parts cells. But I 'm honestly just starting to get confused.
so it's not just me!
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Old 04-26-2012, 12:58 PM   #17
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I get the overwhelming feeling you guys are just trying to get me to do math... I hate math
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Old 04-26-2012, 12:58 PM   #18
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Quote:
DEFINITIONS:

Aliquot: a measured sub-volume of original sample.

Diluent: material with which the sample is diluted

Dilution factor (DF): ratio of final volume/aliquot volume (final volume = aliquot + diluent)

Concentration factor (CF): ratio of aliquot volume divided by the final volume (inverse of the dilution factor)


To calculate a dilution factor:

Remember that the dilution factor is the final volume/aliquot volume.

EXAMPLE: What is the dilution factor if you add 0.1 mL aliquot of a specimen to 9.9 mL of diluent?

The final volume is equal the the aliquot volume plus the diluent volume: 0.1 mL + 9.9 mL = 10 mL
The dilution factor is equal to the final volume divided by the aliquot volume: 10 mL/0.1 mL = 1:100 dilution (10 2)

The Concentration Factor for this problem = aliquot volume/final volume = 0.1/(0.1 + 9.9) = 0.01 or 10 -2 concentration


To prepare a desired volume of solution of a given dilution:

1. Calculate the volume of the aliquot: it is equal either to the final volume/dilution factor or the concentration factor x final volume

2. Calculate the volume of the diluent: which is equal to (the final volume - aliquot volume)

3. Measure out the correct volume of diluent, add the correct volume of aliquot to it, mix.

EXAMPLE: How would you prepare 20 mL of a 1:50 dilution?

Determine required aliquot by dividing final volume by dilution factor: 20 mL/50 = 0.4 mL sample
Subtract the aliquot volume from the final volume: 20 mL - 0.4 mL = 19.6 mL diluent
Measure out 19.4 mL diluent, add 0.4 mL sample to it, mix thoroughly
and here's a link o the site: http://biology.clc.uc.edu/fankhauser.../dilutions.htm
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Old 04-26-2012, 01:24 PM   #19
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I get the overwhelming feeling you guys are just trying to get me to do math... I hate math
So are you not going to chime in
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Old 04-26-2012, 01:45 PM   #20
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lol!
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Old 04-26-2012, 01:52 PM   #21
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lol!
You had me freaking out, thinking that been doing all of my serial solutions wrong
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Old 04-26-2012, 01:55 PM   #22
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You had me freaking out, thinking that been doing all of my serial solutions wrong
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Old 04-26-2012, 02:00 PM   #23
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i think dilution and mix ratios are getting confused, i don't think they are the same.

when you are talking about a mix, 1:10, it would be 1 part A plus 10 parts B, dillution would be 1 part A of 10 parts AB.


found online;

"Don't mix dilution and ratio...

Ratio means you have x parts of A and y parts of B.

x : y

Dilution refers to the total volume.

x : (x+y)"

Last edited by Sleez; 04-26-2012 at 02:04 PM. Reason: spelling
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Old 04-26-2012, 02:11 PM   #24
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Quote:
Originally Posted by Sleez View Post
i think dilution and mix ratios are getting confused, i don't think they are the same.

when you are talking about a mix, 1:10, it would be 1 part A plus 10 parts B, dillution would be 1 part A of 10 parts AB.


found online;

"Don't mix dilution and ratio...

Ratio means you have x parts of A and y parts of B.

x : y

Dilution refers to the total volume.

x : (x+y)"

Ding SDing Ding This is the winner. Ratio is just ratio
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Old 04-26-2012, 02:17 PM   #25
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Quote:
Originally Posted by Sleez View Post
i think dilution and mix ratios are getting confused, i don't think they are the same.

when you are talking about a mix, 1:10, it would be 1 part A plus 10 parts B, dillution would be 1 part A of 10 parts AB.


found online;

"Don't mix dilution and ratio...

Ratio means you have x parts of A and y parts of B.

x : y

Dilution refers to the total volume.

x : (x+y)"
Ok so for a dilution of 10:1 you'd have 1 part "x' and 10 parts "y". Correct?
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