Single drop surface modified graphite furnace atomic absorption spectrometry for large volume injection: determination of cadmium

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

“…Influences of matrix modifier.Graphite furnace atomic absorption spectrometry often subject to matrix interferences that can increase the ashing temperature and can be measured at the same time eliminate the element of loss caused by the background of molecular absorption [12].In this study, four matrix modifiers were used to eliminate interference to improve the sensitivity measure of cadmium and the results were listed in Table 2.Subsequently, 2% (NH 4 ) 2 HPO 4 was selected as matrix modifier. The linear regression equation and correlation coefficients of the working curve were listed in Table 3.…”

Large-Volume Injection Electrothermal AAS Combined with Tungsten-treated Pyrolytic Graphite Furnace: Determination of Cadmium in Tap, Snow and River Water Samples with Phosphate Modifier

“…3,4 Recently, it was found for Cd that a sample solution was condensed at the center of the sample compartment at any volume in 10 -100 µl, and was vaporized smoothly without the formation of any bubble during the dry stage only in the Wtreated PG furnace. 5 A distribution with a higher density of Cd in the center area after dry stage was observed by an atomicabsorption measurement of small cores collected from the furnace inner wall. The high precision resulted in the distribution of Cd during the dry process of the sample solution.…”