An Analyst Prepares a Diluted Standard for Use in a Post-Mortem

question 2

Multiple Choice

An analyst prepares a diluted standard for use in a post-mortem toxicological assay. The analyst dilutes 2.0 uL of a commercial standard, 1.00 mg/mL, to 10.00 mL in a type A volumetric flask. A syringe is used to draw out and deliver the 2.0 uL. The absolute uncertainties of the equipment are:
Volumetric flask: 0.08 mL
Syringe: 0.10 uL
Commercial standard: 0.050 mg/mL
What is the uncertainty of the diluted solution expressed in ug/mL? Report to 2 decimal places

• A) 14.00
• B) 0.070
• C) 2.00
• D) 0.14
• E) 1.35
• F) 13.50

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