A normal-phase high-performance liquid chromatographic/particle beam mass spectrometric (negative chemical ionization) method has been developed for the detection of Synthetic corticosteroids (SC). Characteristic and reproducible full-scan spectra were obtained for the SC analysed. The limit of dete
Optimization of the Hewlett-Packard particle-beam liquid chromatography-mass spectrometry interface by statistical experimental design
β Scribed by S.K. Huang; N.R. Garza
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 593 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1044-0305
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β¦ Synopsis
Optimization of both sensitivity and ionization softness for the Hewlett-Packard particle-beam liquid chromatography-mass spectrometry interface has been achieved by using a statistical experimental design with response surface modeling. Conditions for both optimized sensitivity and ionization softness were found to occur at 55-lb/in.(2) nebulizer flow, 35Β°C desolvation chamber temperature with approximately 45% organic modifier in the presence of 0.02-F ammonium acetate and a liquid chromatography flow rate of 0.2 mL/min.
π SIMILAR VOLUMES
A low voltage (180-V) dc glow discharge device was inserted just below the pneumatic nebulizer in a particle beam interface of a high performance liquid chromatography/mass spectrometry system. The discharge in a helium atmosphere increased the signal produced by 12 test compounds by factors of abou