24. A student was interested in determining the amount of phenol generated from chlorination of water in city water. The student used a preconcentration technique that used a chromatographic stationary phase. The student passed I L of the water through the stationary phase and eluted the phenol using 2 mL of acetonitrile. The sample preparation technique used was. .and the preconcentration factor was.. a. Solid-supported liquid-liquid extraction; 1000 b. Solid-supported liquid-liquid extraction; 500 c. Solid-liquid microextraction; 500 d. Dispersive liquid-liquid microextraction; 1000 e. Solid-phase extraction; 500

Question
24. A student was interested in determining the amount of phenol generated from chlorination of
water in city water. The student used a preconcentration technique that used a
chromatographic stationary phase. The student passed I L of the water through the stationary
phase and eluted the phenol using 2 mL of acetonitrile. The sample preparation technique
used was. .and the preconcentration factor was..
a. Solid-supported liquid-liquid extraction; 1000
b. Solid-supported liquid-liquid extraction; 500
c. Solid-liquid microextraction; 500
d. Dispersive liquid-liquid microextraction; 1000
e. Solid-phase extraction; 500
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Transcribed Image Text

24. A student was interested in determining the amount of phenol generated from chlorination of water in city water. The student used a preconcentration technique that used a chromatographic stationary phase. The student passed I L of the water through the stationary phase and eluted the phenol using 2 mL of acetonitrile. The sample preparation technique used was. .and the preconcentration factor was.. a. Solid-supported liquid-liquid extraction; 1000 b. Solid-supported liquid-liquid extraction; 500 c. Solid-liquid microextraction; 500 d. Dispersive liquid-liquid microextraction; 1000 e. Solid-phase extraction; 500

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