CSC Specimen Validity Testing & Adulteration Detection

Question 1

What is the acceptable pH range for a valid urine specimen in federal workplace drug testing?

Accepted Answer

4.0 to 9.0

Answer

Per HHS/SAMHSA guidelines, a valid urine specimen must have a pH between 4.0 and 9.0 to be considered within physiological range.

Question 2

Which creatinine concentration indicates a substituted specimen under federal drug testing guidelines?

Accepted Answer

Less than 2 mg/dL

Answer

A creatinine concentration less than 2 mg/dL, combined with a specific gravity less than 1.0010, meets the criteria for a substituted specimen.

Question 3

Which of the following is classified as an oxidizing adulterant commonly detected during specimen validity testing?

Accepted Answer

Nitrites

Answer

Nitrites are a commonly used oxidizing adulterant that can destroy drug metabolites and interfere with immunoassay results.

Question 4

What specific gravity value, combined with a creatinine below 2 mg/dL, indicates a substituted specimen?

Accepted Answer

Less than 1.0010

Answer

A specific gravity less than 1.0010 together with creatinine less than 2 mg/dL confirms a specimen as substituted per federal guidelines.

Question 5

How does specimen adulteration differ from specimen substitution?

Accepted Answer

Adulteration means adding a foreign substance to interfere with testing; substitution means replacing the specimen entirely

Answer

Adulteration involves adding a foreign substance (like bleach or nitrites) to interfere with testing, while substitution involves replacing the specimen with synthetic or non-human urine.

(CSC) Certified Specimen Collector Practice Test

(CSC) Certified Specimen Collector Practice Test

CSC Specimen Validity Testing & Adulteration Detection