Talk:Universal indicator

Text and/or other creative content from Disappearing rainbow indicator was copied or moved into Universal indicator with [permanent diff this edit]. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists.

[Colour range]

Does anyone know exaclty what the ranges of the colors are? EG. blue ~ pH x.xx to y.yy? Thanx 68.39.174.150 01:43, 25 Apr 2005 (UTC)

well i got some (maybe inaccurate) data from a ap chem lab, so...

0-2 is red 3 is peachy 4 is orange 5-7 are yellow 8-9 are greenish yellow 10 is green 11 is blue 12-14 is purple hope this helps, even though it's almost a year too late. M1ss1ontomars2k4 03:01, 16 February 2006 (UTC)[reply]

solution

Is it a solution or what? It seems like its a mixture or suspension but it really isn't clear. Also, is it the same stuff that is used in ph paper?

Depends- you can make pH paper with pretty much any indicator. When I made a red cabbage indicator, we also soaked paper in it to make indicator paper. However, universal indicator paper is made from UI. -- Dandelions 13:35, 23 July 2006 (UTC)[reply]

poisonous?

Is it poisonous? If you put three drops in a drink then would it poison you? Thanks =) yes it would...

You're scaring me right now... 212.137.63.86 (talk) 09:52, 21 August 2008 (UTC)[reply]

g

klk86.132.8.203 18:03, 30 April 2007 (UTC)[reply]

I made technical changes to this 6/30/07. I was uncertain about Wikipedia article formatting. I would like to thank whoever cleaned up my formatting. Is there a writers guide that I should check out?

Universal indicator is a very popular educational tool, and the article is now technically sound. Thanks again to the format editor.

Otis 14:24, 30 June 2007 (UTC) osrothen (AKA Otis)[reply]

Is Aphex Twin relavant as a see also?

Shouldn't this be changed to a 'This article is about the acidity indicator, for the artist see Aphex Twin'? Jorourke92 (talk) 14:46, 7 February 2008 (UTC)[reply]

Merge

I merged Disappearing rainbow indicator into this article. I couldn't verify much of the information on the Disappearing rainbow indicator, so not much was preserved. Perhaps some of it was original research, although it seems unusually that a variable mixture could have such definite properties as were described (density, boiling point, vapor pressure). Scientific29 (talk) 21:00, 27 January 2012 (UTC)[reply]

Who is "Yamada"?

The article mentions a man with the surname Yamada who invented the indicator. I can find plenty of other materials indicating that there indeed was a man named Yamada, but nobody seems to have bothered to attach a first name. The Yamada disambiguation page doesn't have an article for him. --65.128.179.240 (talk) 03:48, 23 April 2013 (UTC)[reply]

His first name (from the patent) appears to be 忍 (Shinobu).

66.234.88.172 (talk) 06:44, 4 April 2023 (UTC)[reply]

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Universal indicator. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

Added archive https://web.archive.org/20060925035727/http://www.iscid.org/encyclopedia/Universal_Indicator to http://www.iscid.org/encyclopedia/Universal_Indicator

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 19:16, 21 July 2016 (UTC)[reply]