An Ultra-microsyringe for sample loading on field desorption emitters
✍ Scribed by D. F. Barofsky; W. Frick; H. D. Beckey; E. Hilt; Anthony I. Mallet; Patricia Tippett
- Book ID
- 102557645
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 167 KB
- Volume
- 15
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
✦ Synopsis
In some applications of field desorption (FD) mass spectrometry it is better to use untreated or slightly preroughened tungsten wires instead of wires activated by a growth of carbon needles which are typically about 40 p m long. Untreated tungsten wires of 10 p m diameter have been used successfully by Rollgen and co-workers1-3 to study alkali ion attachment to polar organic molecules and field desorption of molecules from electrolytic solutions.
Frick et aL4 showed that preroughened wires are useful in analytical applications if only extremely small amounts (-50 pg) of samples are available. For example, only c. 100 ng of hypophysiotropic hormones were