{"id":40,"date":"2016-08-18T16:14:21","date_gmt":"2016-08-18T20:14:21","guid":{"rendered":"https:\/\/sciencescosmaincms.cm.ucf.edu\/chemistry\/nmr\/?page_id=40"},"modified":"2016-12-15T16:28:14","modified_gmt":"2016-12-15T21:28:14","slug":"sample-tubes","status":"publish","type":"page","link":"https:\/\/sciences.ucf.edu\/chemistry\/nmr\/guides\/sample-tubes\/","title":{"rendered":"Sample Tubes"},"content":{"rendered":"<p style=\"text-align: center\">[<a href=\"http:\/\/www.wilmad-labglass.com\/ProductList.aspx?t=109\" target=\"_blank\">Wilmad-LabGlass<\/a>] [<a href=\"http:\/\/www.nmrtubes.com\/shop-online.php?c=nmrtubes\" target=\"_blank\">Norell<\/a>]<\/p>\n<h3>Tube Considerations:<\/h3>\n<ul>\n<li>Only Wilmad or Norell tubes should be used. For the sake of your spectra and the safety of our instruments I strongly discourage using generic tubes<\/li>\n<li>Always use a cap<\/li>\n<li>Never use a tube which has cracked or broken in any way, including chipping at the top. These are much more likely to shear<\/li>\n<li>If you dry tubes in an oven, do not place upright in a beaker or tube rack. Always lay the tubes flat (see <a href=\"#oven-drying\">here<\/a>)<\/li>\n<li>All of our instruments use 5mm tubes<\/li>\n<\/ul>\n<h2>Purchasing<\/h2>\n<p>Tubes should be purchased directly from one of the manufacturers linked above as opposed to through a third party. This should result in a substantial savings. For instance, a 507-PP-8 tube directly from Wilmad costs $9.20 (not including our academic discount) while a 5 pack of the same tube from a well-known third party costs $56.20 (not including any discounts).<\/p>\n<p>You have a choice of 7,8, or 9 inch tubes. All will work fine. I personally prefer 8 inch tubes. Two considerations: use a 9 inch tube if you are going to flame seal your tube; and you should consider a 7 inch tube if you plan to use a pH meter for solutions within a tube (some nmr-specific pH meters are rather short and will not submerge in a solution of appropriate volume in a longer tube).<\/p>\n<h2>Recommendations<\/h2>\n<p>I recommend purchasing tubes from Wilmad. We receive an academic discount of 25% along with free shipping. Which tubes you purchase depend on what you will be doing:<\/p>\n<table style=\"width: 100%\">\n<tbody>\n<tr>\n<td style=\"width: 229px\"><\/td>\n<td style=\"text-align: center;width: 231px\" colspan=\"2\"><strong>Wilmad<\/strong><\/td>\n<td style=\"text-align: center;width: 167px\" colspan=\"2\"><strong>Norell<\/strong><\/td>\n<td style=\"text-align: center;width: 122px\"><strong>Class of Glass<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;width: 229px\"><strong>Application<\/strong><\/td>\n<td style=\"text-align: center;width: 153px\"><strong>Item<\/strong><\/td>\n<td style=\"text-align: center;width: 78px\"><strong>Price<\/strong><\/td>\n<td style=\"text-align: center;width: 97px\"><strong>Item<\/strong><\/td>\n<td style=\"text-align: center;width: 70px\"><strong>Price<\/strong><\/td>\n<td style=\"text-align: center;width: 122px\">B<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 229px\">Routine experiments<\/td>\n<td style=\"text-align: center;width: 153px\">WG-5MM-ECONOMY-8<\/td>\n<td style=\"text-align: center;width: 78px\">$2.02<\/td>\n<td style=\"text-align: center;width: 97px\">ST-550-8<\/td>\n<td style=\"text-align: center;width: 70px\">$1.90<\/td>\n<td style=\"text-align: center;width: 122px\">B<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 229px\">Routine experiments (mildly superior lineshape)<\/td>\n<td style=\"text-align: center;width: 153px\">WG-1226-8<\/td>\n<td style=\"text-align: center;width: 78px\">$4.47<\/td>\n<td style=\"text-align: center;width: 97px\">506-P-8<\/td>\n<td style=\"text-align: center;width: 70px\">$5.48<\/td>\n<td style=\"text-align: center;width: 122px\">A<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 229px\">Variable temperature<\/td>\n<td style=\"text-align: center;width: 153px\">505-PS-8<\/td>\n<td style=\"text-align: center;width: 78px\">$5.64<\/td>\n<td style=\"text-align: center;width: 97px\">S-5-200-8<\/td>\n<td style=\"text-align: center;width: 70px\">$4.78<\/td>\n<td style=\"text-align: center;width: 122px\">A<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 229px\">Variable temperature (mildly superior lineshape)<\/td>\n<td style=\"text-align: center;width: 153px\">507-PP-8<\/td>\n<td style=\"text-align: center;width: 78px\">$9.20<\/td>\n<td style=\"text-align: center;width: 97px\">S-5-300-8<\/td>\n<td style=\"text-align: center;width: 70px\">$7.52<\/td>\n<td style=\"text-align: center;width: 122px\">A<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 229px\">Water suppression\/mutli-dimensional experiments<\/td>\n<td style=\"text-align: center;width: 153px\">528-PP-8<\/td>\n<td style=\"text-align: center;width: 78px\">$13.94<\/td>\n<td style=\"text-align: center;width: 97px\">S-5-500-8<\/td>\n<td style=\"text-align: center;width: 70px\">$15.04<\/td>\n<td style=\"text-align: center;width: 122px\">A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Cleaning \/ Drying<\/h2>\n<p>Please see Wilmad&#8217;s technical document <a href=\"http:\/\/www.wilmad-labglass.com\/Support\/NMR-and-EPR-Technical-Reports\/Proper-Cleaning-Procedures-for-NMR-Sample-Tubes\/\" target=\"_blank\">NMR-010<\/a> for details on properly cleaning your tubes. Of great importance to our spectrometers is the following excerpt:<\/p>\n<p><strong>&#8220;Drying tubes at elevated temperatures can reshape and ruin precision NMR tubes. If you dry tubes in an oven, WILMAD recommends placing tubes on a perfectly flat tray at 125oC for only 30-45 minutes. Better is the use of a vacuum oven that will remove water at lower temperatures. In a flat position, tubes that do reshape could be out-of-round and may not fit the spinner turbine as well. But they&#8217;ll not affect the spectrometer probe adversely. Tubes placed in an oven in a beaker, flask, or tube rack can bend, increasing Camber (lack of straightness). Bent tubes may still fit the spinner turbine, but can damage or break the NMR probe insert, a costly repair with many probes.&#8221;<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Wilmad-LabGlass] [Norell] Tube Considerations: Only Wilmad or Norell tubes should be used. For the sake of your spectra and the<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":38,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-40","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sample Tubes - NMR Facility &amp; Cryogenic Services<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sciences.ucf.edu\/chemistry\/nmr\/guides\/sample-tubes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sample Tubes - NMR Facility &amp; Cryogenic Services\" \/>\n<meta property=\"og:description\" content=\"[Wilmad-LabGlass] [Norell] Tube Considerations: Only Wilmad or Norell tubes should be used. 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