Which of the following is the most accurate measurement of Pi in serum?
A) Rate of unreduced phosphomolybdate formation at 340 nm
B) Measurement of phosphomolybdenum blue at 680 nm
C) Use of aminonaptholsulfoni c acid to reduce phosphomolybdate
D) Formation of a complex with malachite green dye
Question 2
The only acceptable anticoagulant for a calcium determination is:
A) Citrate
B) Fluoride
C) Heparin
D) EDTA