[Selection of matrix modifier for GF-AAS determination of trace lead in soil watered with waste water and its application].
The rapid and direct method of selection of the matrix modifier for the determination of trace lead in soil watered with waste water by graphite furnace atomic absorption spectrometry under the best matrix modifier selected has been developed. The effect of the matrix modifiers including NH4 Hz2PO4, (NH4)3PO4, NH4CI, Pd-Mg, NH4H2PO4+MgNO3+NH4NO3 etc. was determined by using graphite furnace atomic absorption spectroscopy. The results showed that NH4H2PO4 is the best matrix modifier for the determination of lead in soil watered with waste water, and the content of lead was determined by using 4.0 mg x L(-1) NH4H2PO4 as a matrix modifier, ashing and atomization temperature of 850 degrees C and 1600 degrees C, respectively, and rectifying background. The relative standard deviation of the method was 2.6%, and the recovery was in the range of 92.4%-104%.
Shawket
Abliz
A
College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. shawket_ablia@yahoo.com.cn
Saniya
Tohtit
T
Abliz
Yimit
Y
Wang
Ji-de
JD
Shi
Rui-fen
RF
D007854:Lead / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D007854:Lead