CHMB16H3 Chapter 1: CHMB16 Chapter 1
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The measurement of Li in brine is used by geochemists to help determine the origin of brine in oil fields. The analysis of replicate samples of a marine sediment sample gave the results shown below:
Sample Preparation | [Li] Found in Original (Micrograms/g) | Analytical Method |
1. None | 25.1 | Standard Curve |
2. Dilute to 1/10 with water | 64.8 | Standard Curve |
3. Dilute to 1/10 with water | 82.5 | Standard Addition |
a) suggest a reason for the increasing concentration of Li in samples 1 through 3
b) What value would you reccomend for the real concentration of Li in the sample and why?
c) Name an analytical method other than a calibration curve or standard addition that can be employed to obtain an accurate and precise measurement of Li in these marine sediment samples.