Instrumental photon activation analysis of coal fly ashes using the internal standard method coupled with the standard addition method

1991 ◽  
Vol 152 (1) ◽  
pp. 55-66 ◽  
Author(s):  
K. Masumoto ◽  
M. Yagi
Keyword(s):  
Activation Analysis ◽  
Standard Method ◽  
Internal Standard ◽  
Standard Addition ◽  
Photon Activation Analysis ◽  
Photon Activation ◽  
Internal Standard Method ◽  
Addition Method ◽  
Fly Ashes ◽  
Coal Fly Ashes

scholarly journals Ginsenosides in Commercial Ginseng Products Analyzed by Liquid Chromatography-Tandem Mass Spectrometry

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Linda Uhr ◽  
Yuchun Chen ◽  
Daniel Sit ◽  
Paul C. H. Li
Keyword(s):  
Standard Method ◽  
Internal Standard ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Tandem Mass ◽  
Internal Standard Method ◽  
Addition Method ◽  
Standard Methods ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Although the LC/MS-MS method has been developed to analyze ginsenosides in ginseng roots, this method has not yet been utilized to quantify ginsenosides in ginseng products. In this paper, an internal standard method by LC/MS-MS was developed to analyze the ginsenosides content in the commercial ginseng products such as the ginseng capsules. We compare the standard addition method and the internal standard methods for the quantification of several ginsenosides (e.g., Rb1, Rb2, Rb3, Rc, Rd, Re, Rg1, and Rg3) in five commercial ginseng capsules. The results showed that the internal standard method is as good as the standard addition method and is a less tedious approach.

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