7. How would you carry out the following analyses? Describe the necessary sample preparation steps and...

7. How would you carry out the following analyses? Describe the necessary sample preparation steps and your choice of appropriate analytical instrumentation:

a. Simultaneous determination of Pb, Zn, Cr, and Cd in crops grown in soil treated with sewage sludge.

b. Determination of pesticide residues in apples.

c. Determination of Pb in human plasma.

d. Determination of SO₄^-2, NO₃^-, and PO₄^-3 in compost to be used for lawn fertilizer.

e. Screening for gasoline contamination around underground storage tanks.

f. A simple field test for detection of PCBs at a contaminated land site.

Expert Solution

queen_honey_blossom answered 2 years ago

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