Which technique I to IV is best suited to each application below? Use each technique only once. Justify each choice in one sentence.
I. Colorimeter
II. Discrete analyzer
III. 96 96-Well microplate
IV. Flow injection analysis
a. In the second week of a four-week biochemistry experiment, you have 50 50 fractions collected from a gel filtration column to determine which fractions contain lactate dehydrogenase. You are given only 400 μL 400 μL of 0.100 mg/mL 0.100 mg/mL lactate dehydrogenase to prepare your calibration curve.
b. Your environmental lab has 2 000 2000 samples to be analyzed for trace ammonia by next week.
c. Twenty water samples must be analyzed for

during each work shift.
d. Your professor heard you will be hiking the Appalachian Trail next summer. She asks you to collect 100-mL 100-mL water samples from the ten streams with the highest concentration of phosphate.

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Cl-,CI¯, NH3,NH₁, PO43-,PO, and SO42-80