Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old 07/18/2008, 11:19 AM   #1
discocarp
Registered Member
 
Join Date: Jul 2003
Location: Winter Park, FL
Posts: 2,707
Converting salinity stock solution

I need a math check please. If I have 1 part of a 1.026 salinity calibration fluid (53us) and I want to convert it to a 1.009 calibration fluid, I need to add 1.889 parts rodi to the 1.026 solution. Correct?

FYI, the goal here is to be able to calibrate my pinpoint salinity monitor to 1.009 for hyposalinity treatment.


discocarp is offline   Reply With Quote
Old 07/18/2008, 11:52 AM   #2
Randy Holmes-Farley
Reef Chemist
 
Randy Holmes-Farley's Avatar
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 86,233
Yes, your calculation is close enough for this purpose. If you really get down to it, specific gravity will not be exactly linear with salinity, but it is quite close.


__________________
Randy Holmes-Farley

Current Tank Info: 120 mixed reef
Randy Holmes-Farley is offline   Reply With Quote
Old 07/18/2008, 11:56 AM   #3
discocarp
Registered Member
 
Join Date: Jul 2003
Location: Winter Park, FL
Posts: 2,707
Thanks Randy. I figured this method was close enough for my purposes. I've been a lot less exact in the past with hypo, so this is just the next step.

Let me ask you one other quick question. If I have my pinpoint probe calibrated to 52us, and I stick it in the 1.009 solution and it gives me, say, 18.5 or something slightly off. Can I assume that 18.5=1.009 without needing to adjust the calibration?

Does that even make sense? I don't think I phrased it well.


discocarp is offline   Reply With Quote
Old 07/18/2008, 12:01 PM   #4
Randy Holmes-Farley
Reef Chemist
 
Randy Holmes-Farley's Avatar
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 86,233
Yes, there is no need to recalibrate. Just match the value.


__________________
Randy Holmes-Farley

Current Tank Info: 120 mixed reef
Randy Holmes-Farley is offline   Reply With Quote
Old 07/18/2008, 12:08 PM   #5
discocarp
Registered Member
 
Join Date: Jul 2003
Location: Winter Park, FL
Posts: 2,707
Thanks Randy!


discocarp is offline   Reply With Quote
Old 07/18/2008, 12:54 PM   #6
Randy Holmes-Farley
Reef Chemist
 
Randy Holmes-Farley's Avatar
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 86,233
You're welcome.

Good luck.


__________________
Randy Holmes-Farley

Current Tank Info: 120 mixed reef
Randy Holmes-Farley is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 02:57 AM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2020 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.