Answer to Question #341561 in General Chemistry for Jiin

Question

A certain concentration works best when the analyte’s concentration is approximately 10ppb.

B. If the analyte is present at 10% w/v, how would you prepare the sample for analysis

Answer 1

c=10%=0.1

c₁=10x10^-9=10^-8

c/c₁=0.1/10^-8=10⁷

We have to dilute the sample 10⁷ times

For example:

Place 1 ml of the sample in a 1 L flask and dilute to the mark with water. (solution 1). We dilute the sample 10³ times.

Place 1 ml of the solution 1 in a 1 L flask and dilute to the mark with water. (solution 2). We dilute the sample 10⁶ times.

Place 1 ml of the solution 2 in a 10 ml flask and dilute to the mark with water. We dilute the sample 10⁷ times.