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.

scholarly journals Determination of heavy metals in soil by inductively coupled plasma mass spectrometry (ICP-MS) with internal standard method

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Jingchun Mao ◽  
Xinyue Liu ◽  
Bao Chen ◽  
Famei Luo ◽  
Xudong Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Standard Method ◽  
Inductively Coupled Plasma ◽  
Internal Standard ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Internal Standard Method ◽  
Addition Method ◽  
Inductively Coupled

<p>Soil ,the carrier of agricultural production and important part of the ecological environment, is heavily contaminated with hazards heavy metals. Therefore, it is oblige to research analytical techniques that could efficiently determine the total content of heavy metals in soil. The determination of heavy metals in soil was disturbed by matrix elements or spectral interferences . In this study , this problem was solved by internal standard method . GBW07402、GBW07448、GBW07423、GBW07428、GBW074079 soil sample were chosen to be the Certified Reference Materials, soils was prepared by microwave digestion with mixed acid following analyzed for determination the content（Cr,Cu, Pb,Ba,Ni,Mn ） by Inductively coupled plasma mass spectrometric in 50ug/L internal standard concentration, the method was validated by compared with certified values 、method contrast(standard addition method versus internal standard method scan the same prepared solution ) and recovery check. The results of internal standard method are in excellent agreement with the indicative values and the date obtained from standard addition method, respectively. Recoveries were adequate being in the acceptable range of 90-99% and RSD of &lt;6.7 % for all the elements at three level of 5,20 and 50mg/kg with quantified by standard addition method and internal standard method .Finally, The graphy of quality control(n=100)were obtained to guide internal quality control in laboratory</p>

Sign in / Sign up

Export Citation Format

Share Document