Cannonical tag not working

[cheaptubes]

I have put canonical tags on most of my pages as I'm slowly fixing the website errors that cause me to lose my rankings last July.  However, when I search google for "graphene nanoplatelets" i find it shows the non canonical version. see below cut from the 2nd page of organic results.

Graphene Nanoplatelets-GNPs - Cheap Tubes Inc.

<cite class="_Hd">cheaptubes.com/graphene-nanoplatelets.htm</cite>High quality, low cost Graphene Nanoplatelets-GNPs.I know I put the canonical tag on the page, see code below. I do not see an error but I am an SEO rookie <title>Graphene Nanoplatelets-GNPs</title> If anyone can find an error in my canonical tag, please tell me where it is so I can fix.  I know its affecting other pages as well and most should have the tag.  Some non product pages don't have it yet but will as I continue fixing it.

[TomRayner]

Hi there

You need a closing paranthesis at the end of your canonical tag.  Basically, you need a "/" before the ">", so it should read:

[Highland]

This post is deleted!

[Kingof5]

Keep in mind that bots don't have to obey canonicals - they're just a suggestion.

[cheaptubes]

perfect, thank you so much