What Is the Specimen of Choice for Determining Arsenic Exposure

question 7

Multiple Choice

What is the specimen of choice for determining arsenic exposure in an individual and why?

• A) Urine is the specimen of choice because arsenic is concentrated in and excreted predominantly by kidneys.
• B) Whole blood is the specimen of choice because blood concentrations remain elevated for at least 48 hours after exposure.
• C) Serum is the specimen of choice because arsenic moves into the serum phosphate pool and is easily measured with phosphate.
• D) Plasma is the specimen of choice because arsenic attaches to coagulation factors and affects clotting times best assayed in a plasma sample.

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