Page 30 of NMR Sampling Tubes, Supplies & Accessories by Wilmad Labglass

micro cell insert for 5mm tubes for use with small sample sizes in thin size tube taking spectra of small sample volumes can be difficult at times wilmad s 5mm microcell assembly is designed to reduce these difficulties for you there are three different inserts to choose from depending on your sample size and requirements either spherical bulb capillary tube or cylindrical bulb volume sizes are listed in the table below you must order the ptfe holder which holds the insert in the nmr tube and the positioning rod which allows you to insert and remove the assembly from the tube these items are reusable the inserts intended for one time use note not recommended for variable temperature application ptfe and pyrex® have different coefficients of thermal expansion thus the precision nature of the match is only acceptable at room temperature to fill and empty the bulb inserts use product no 90630 teflon needles with syringes found on pages 64 and 65 5mm micro cell assembly complete with outer 5mm tube teflon® holder positioning rod and one spherical bulb other inserts and extra spherical bulbs are ordered separately microcells product no 529-a 529-d cylindrical microcells product no 529-e 529-e-5-l-15 529-e-5-l-20 components product no 529-b 529-c description ptfe holder positioning rod length mm 50 228 description cylindrical bulb cylindrical bulb cylindrical bulb volume µl 110 140 190 cylinder length l mm 12 15 20 description spherical bulb capillary tube volume 18 µl 8 µl/cm 529­c positioning rod the positioning rod is removed prior to capping the tube and recording the spectrum microcell a example using the 529­a assembly prior to removal of positioning rod wilmad nmr tube .039 approx i.d 13/4 long 3 50mm 529­a 529­d 529­e 529­b cylindrical microcells can be prepared in lengths to match your probe inquire about price and delivery 24 www.wilmad-labglass.com 24

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