Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

part per million conversions

part per million conversions

part per million conversions

Hey guys... quick question

I need to dilute my chemical into parts per million. But of course the only way to order it is (48 wt%, in water 99.9%)... 100ml bottle

Is there anything tricky in the conversion or can i just go about it as if it was 100%

if 100%, i could just do 1ml into 999ml water, stir, then put 1ml of that solution into 999ml of more water. That would give me 1 ppm right?

So if 48 wt%, could i go about it the same way...
48/100 * 1/500 * 1/1000 = 0.00000096 which is almost 1 ppm

Theoretically, would that still work? I know i can do it on a smaller scale, but i'm just not sure if my conversion still works.

Thanks guys

RE: part per million conversions

No, that's not very accurate -- it assumes that the solution density is the same as water, 1 g/ml.  

You also need the density of the 48 wt% solution. The maxium density limit is 48 grams solid ideally dissolved in 52 grams water having a density (48 + 52)/52 = 1.923 g/ml.  So, dissolved solid = 0.923 g/ml. Then, to get 1 Liter of 1000 ppm solution, want 1 gram dissolved solids so use 1/0.923 = 1.083 ml, diluted to 1 Liter.

The density of the solution may be available from the MSDS, product bulletin, CRC Handbook of Chemistry & Physics.

RE: part per million conversions

Thanks Kenvlach,

I'm pretty sure i figured it out. Thanks


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close