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31 I am seeing a loss in concentration of heparin with HPLC when using syringe filters. What do you recommend?

Heparin has strongly acidic sulfonate groups (negatively charged) that will bind with nylon filter membrane material. PTFE is not suitable because of its hydrophobicity. The most appropriate membrane…

32 Instantly search a document for exact text matches (Ctrl-F)

On a PC, you can instantly find any specific text that is found in a document using Ctrl-F (Command-F on a Mac). This will work for webpages, Word files, pdfs, and any other document with text (note:…

33 Micro Tube Cutter: Instructions for blade replacment

Catalog # 35000-01 Squeeze handles until the small hole in the blade appears. Insert a pin or straightened paper clip into the hole and release the handles. Depress the tab located above the spring inside…

34 Pressure Conversion Chart

Use this handy chart to convert back pressures into different units of measure. psi Bar 72.5 5.0 100.0 6.9 144.9 10.0 362.4 25.0 500.0 34.5 724.7 50.0 1,000.0 68.9 1,449.5 100.0 1,500.0 103.4 2,000.0…

35 Some common HPLC 4.6mm ID column volumes

4.6mm ID 50mm Long 75mm Long 100mmLong 150mmLong 250mmLong Volume 0.83ml 1.25ml 1.66ml 2.49ml 4.15ml Click here to calculate your column volume © Copyright MicroSolv Technology Corporation, all rights…

36 Tips on cutting stainless steel tubing

Cutting stainless steel tubing for HPLC can be challenging. Here are some tips and instructions on cutting tubing using the MicroSolv tubing cutter, Catalog number 46001-01. Introduce the tubing into…

37 What are the dimensions of the Water Jacket150 for HPLC columns?

The Water Jacket150™ catalog number 49700-150J, has the following dimensions: Internal Diameter (ID): 2.86 cm (1 1/8 in.) Internal Length: 19.0 cm (7.5 in.) The item will accommodate any column that…

38 What are the dimensions of the Water Jacket300 for HPLC columns?

The Water Jacket300™ catalog number 49700-300J, has the following dimensions: Internal Diameter (ID): 2.86 cm (1 1/8 in.) Internal Length: 35.6 cm (14 in.) The item will accommodate any column that…

39 What are the dimensions of the Water Jacket350 for HPLC columns?

The Water Jacket350™ catalog number 49700-350J, has the following dimensions: Internal Diameter (ID): 2.86 cm (1 1/8 in.) Internal Length: 40.6 cm (16 in.) The item will accommodate any column that…

40 What are the dimensions of the Water Jacket75 for HPLC columns?

The Water Jacket75™ catalog number 49700-75J, has the following dimensions: Internal Diameter (ID): 2.86 cm (1 1/8 in.) Internal Length: 10.2 cm (4 in.) The item will accommodate any column that has…

41 What are the dimensions of the Water JacketPrep30 for HPLC columns?

The Water JacketPrep30™ catalog number 49700-Prep30, has the following dimensions: Internal Diameter (ID): 4.6 cm (1.81 in.) Internal Length: 40.6 cm (16 in.) The item will accommodate any column that…

42 What are the dimensions of the Water JacketPrep50 for HPLC columns?

The Water JacketPrep50™ catalog number 49700-Prep50, has the following dimensions: Internal Diameter (ID): 4.6 cm (1.81 in.) Internal Length: 61.0 cm (24 in.) The item will accommodate any column that…

43 What method conditions can you suggest for the analysis of maleic hydrazide?

Maleic hydrazide has a pKa of 5.62 and a logP of -1.96. This logP value means it is very hydrophilic and will not retain well in reversed phase HPLC. For this reason, we would suggest you try our Cogent…

44 Where should I attach a static mixer in my HPLC instrument?

Static mixers are designed to reduce detector noise associated with heterogeneity of multiple mixed solvent sources by mixing more thoroughly than can be accomplished with a proportioning valve. The best…

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