CPC Specimen Collection Procedures & Chain of Custody 2

Question 1

Which additive in a lavender-top (EDTA) tube is primarily used for hematology testing?

Accepted Answer

Ethylenediaminetetraacetic acid (EDTA)

Answer

EDTA chelates calcium ions to prevent blood from clotting, making it ideal for hematology studies such as CBC.

Question 2

When collecting a urine specimen for a chain-of-custody drug screen, what is the minimum required volume typically specified?

Accepted Answer

30 mL

Answer

Federal workplace drug testing guidelines require a minimum of 30 mL for a urine specimen to allow for split-sample testing.

Question 3

A collector notices the donor's urine temperature reads 94°F (34.4°C) immediately after collection. What is the correct action?

Accepted Answer

Accept the specimen as valid

Answer

Acceptable urine temperature range is 90–100°F (32–38°C), so 94°F falls within this range and the specimen should be accepted.

Question 4

What is the purpose of the 'split specimen' procedure in federal workplace drug testing?

Accepted Answer

To allow the donor to request a retest of the same collection at a different lab

Answer

The split specimen (Bottle B) is sealed and stored; if the donor challenges a positive result, Bottle B is sent to another certified lab for confirmation.

Question 5

Which of the following actions is REQUIRED before sealing a forensic urine specimen under chain of custody?

Accepted Answer

Having the donor initial the tamper-evident seal over the bottle cap

Answer

The donor must initial the tamper-evident seal in the collector's presence to establish the chain of custody and prevent tampering allegations.

(CPC) Certified Professional Collector Practice Test

(CPC) Certified Professional Collector Practice Test

CPC Specimen Collection Procedures & Chain of Custody 2