Lead Determination in Chinese Herbal Medicine by Graphite Furnace Atomic Absorption Spectrometry Using Matrix Modifier

2012 ◽  
Vol 485 ◽  
pp. 119-122
Author(s):  
Shao Ping Feng ◽  
Zhao Long Huang ◽  
Ping Yi ◽  
Na Wu ◽  
Ze Feng Wang ◽  
...  
Keyword(s):  
Herbal Medicine ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Chinese Herbal Medicine ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Matrix Modifier ◽  
Chinese Herbal ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

An effective and expeditious method was developed for continuous determination of Pb in Chinese herbal medicine of Panax Notoginseng by using graphite furnace atomic absorption spectrometry (GFAAS) with high-pressure digestion. Under the optimum conditions, the linear range of Pb was 0 to 50 µg/L, and its detection limits was 0.871 µg/L, with 2% (NH4)2HPO4 was used as matrix modifier, respectively. The precision relative standard deviations was 3.98% for determining Pb by this method, and the spike recoveries range from 93.4% to 103.0%.

Determination Cadmium in Panax notoginseng of Chinese Herbal Medicine by Graphite Furnace Atomic Absorption Spectrometry Based on Biological Materials

2012 ◽  
Vol 485 ◽  
pp. 60-63
Author(s):  
Zhao Long Huang ◽  
Shao Ping Feng ◽  
Yu Da Zhang ◽  
Du Lin Kong ◽  
Ya Shun Chen ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Herbal Medicines ◽  
Absorption Spectrometry ◽  
Panax Notoginseng ◽  
Chinese Herbal ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption ◽  
The Matrix

A graphite furnace atomic absorption spectrometry (GFAAS) method for cadmium determination in Chinese herbal medicines was prepared. In this study, 2% (NH4)2HPO4 was used as matrix modifier, which could enhance the ashing temperature and eliminate the matrix interference.Cadmium has been determined using GFAAS method with deuterium background correction. The linear ranges of cadmium was 0 to 10 µg/L and the analytical detection limits was 0.13 µg/L, respectively. The precision relative standard deviations was 3.82% and the spike recoveries range from 97.5% to 101.3%.

scholarly journals Determination of Trace Antimony (III) in Water Samples with Single Drop Microextraction Using BPHA-[C4mim][PF6] System Followed by Graphite Furnace Atomic Absorption Spectrometry

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoshan Huang ◽  
Mingxin Guan ◽  
Zhuliangzi Lu ◽  
Yiping Hang
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Limit Of Detection ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Extraction Methods ◽  
Single Drop ◽  
Single Drop Microextraction ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

A new sensitive method for antimony (III) determination by graphite furnace atomic absorption spectrometry (GFAAS) has been developed by using N-benzoyl-N-phenylhydroxylamine (BPHA) and 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]) single drop microextraction. The single drop microextraction (SDMM) system is more competitive compared with other traditional extraction methods. Under the optimized conditions, the limit of detection (signal-to-noise ratio is 3) and the enrichment factor of antimony (III) are 0.01 μg·L−1 and 112, respectively. The relative standard deviation of the 0.5 μg·L−1 antimony (III) is 4.2% (n=6). The proposed method is rather sensitive to determinate trace antimony (III) in water.

scholarly journals Determination of Platinum in Wine by Graphite Furnace Atomic Absorption Spectrometry

1997 ◽  
Vol 80 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Carmen Cabrera-Vique ◽  
Pierra-Louis Teissedre ◽  
Marie-Thérèse Cabanis ◽  
Jean-Claude Cabanis
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
White Wines ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A method based on graphite furnace atomic absorption spectrometry (GFAAS) was developed for determining platinum in wine. Wine samples were prepared by microwave acid digestion or dry mineralization. The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples. Analyte modifiers and furnace conditions were optimized. Effects of cations (Mg2+, Ca2+, K+, Na+, and NH|) and anions (PO43, SO42) were tested separately and in combination. Analytical characteristics of the method were optimized for analyte recovery and signal enhancement. Recoveries ranged from 92.5 to 102%, and precision reproducibility relative standard deviation varied from 7.5 to 10%. Red, rosé, and white wines from France were analyzed. Platinum levels found in most wines were very low (<10 μg/L).

scholarly journals Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption Spectrometry

2011 ◽  
Vol 62 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Blanka Tariba ◽  
Alica Pizent ◽  
Zorana Kljaković-Gašpić
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Accurate Determination ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
White Wine ◽  
Matrix Modifier ◽  
Graphite Furnace Atomic Absorption

Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption SpectrometryA method has been developed for direct determination of lead in wine by graphite furnace atomic absorption spectrometry (GFAAS) with Zeeman-effect background correction. The thermal behaviour of Pb during pyrolysis and atomisation stages was investigated without matrix modifier and in the presence of Pd(NO3)2, Pd(NO3)2+ Mg(NO3)2× 6H2O, and NH4H2PO4+ Mg(NO3)2× 6H2O as matrix modifiers. A simple 1:1 dilution of wine samples with Pd(NO3)2as a matrix modifier proved optimal for accurate determination of Pb in wine. Mean recoveries were 106 % for red and 114 % for white wine, and the detection limit was 3 μg L-1. Within-run precision of measurements for red and white wine was 2.1 % and 1.8 %, respectively. The proposed method was applied for analysis of 23 Croatian wines. Median Pb concentrations were 33 μg L-1, range (16 to 49) μg L-1in commercially available wines and 46 μg L-1, range (14 to 559) μg L-1in home-made wines. There were no statistically significant differences (P<0.05) in Pb concentration between commercial and home-made wines or between red and white wines.

Determination of Lead in Table Wines by Graphite Furnace Atomic Absorption Spectrometry

1994 ◽  
Vol 77 (4) ◽  
pp. 1023-1030 ◽  
Author(s):  
William R Mindak
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Pyrolytic Graphite ◽  
Absorption Spectrometry ◽  
Dihydrogen Phosphate ◽  
Easy Method ◽  
Standard Curve ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A quick, easy method was developed for the analysis of table wines for lead quantitated at ≥14 ng Pb/mL wine. The method uses graphite furnace atomic absorption spectrometry with Zeeman background correction and a L’vov pyrolytic graphite platform. Ammonium dihydrogen phosphate is used as a matrix modifier. Wines are diluted by a factor of 10 with 1% HNO3 and analyzed directly. Their absorbances are compared with those of a standard curve prepared with 1 % HNO3. Analytical results obtained by comparison with a standard curve agreed with those obtained by the method of standard additions. Four white, 4 red, and 2 rosé wines were studied. Pb concentrations varied from 15 to 135 ng Pb/mL. Wines fortified with 100 ng Pb/mL had an average recovery of 94%. The average short-term relative standard deviation (RSD) was 2.1%; the average long-term RSD was 7.4%. The estimated detection (3 σ) and quantitation (10 σ) limits were 4 and 14 ng Pb/mL, respectively.

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