ABSTRACT
In hygienic examination experiment teaching,Science inquisition is the important practice for students to gain knowledge and solve problems. In order to enhance students’scientific accomplishment and raise their scientific research ability,inquisition subject design should be highlighted and inquisition horizontal level should be well designed and science inquisition method education should be valued in experiment teaching.
ABSTRACT
Objective To establish a method for determination of copper, manganese and cadmium in human urine by transversely heated GFAAS.Methods Matrix modifiers were used and background absorption was deducted, copper, manganese and cadmium in human urine were determined by transversely heated GFAAS after digestion.Results 5 g/L Mg(NO3)2 was taken as the matrix modifier when copper and manganese were determined and 0.3 g/L Mg(NO3)2 and 5 g/L NH4H2PO4 was taken as the matrix modifier when cadmium was determined.Under the designed standard conditions, the detection limits of copper, manganese and cadmium were 0.028-0.060 ?g/L;RSDs were 1.1%-5.1%;Recovery rates were 94.2%-107.5%.Conclusion The method is simple, accurate and sensitive, and is applicable to the determination of copper, manganese and cadmium in human urine.