1. The Cocaine test device only provides a preliminary qualitative analytical result. The preferred confirmatory method for quantitating the concentration of Cocaine in the specimen is Gas Chromatography/ mass Spectrometry. After performing the screening test for Cocaine, 3 specime were interpreted as POSITIVE and 10 specimens were interpreted as NEGATIVE. How many specimens will be sent for Confirmatory testing? Why? 2. This symbol was seen on the box containing the test devices for Cocaine. What does it mean? 2. 3. Another symbol was seen on the box containing the test devices for Cocaine. What does it mean?

1. A drug was administered by rapid IV injection into a 70-kg adult male. Blood samples were withdrawn over a 7-hour period and assayed for intact drug. The results are tabulated below. Using the method of residuals, calculate the values for intercepts A and B and slopes a, ß, k, k12, and k21. Download (.pdf)|Print Time (hours) 0.00 0.25 0.50 0.75 1.00 1.50 2.00 C(μg/mL) 70.0 53.8 43.3 35.0 29.1 21.2 17.0 Time (hours) 2.5 3.0 4.0 5.0 6.0 7.0 C(μg/mL) 14.3 12.6 10.5 9.0 8.0 7.0

Please explain: A laboratory scientist working the night shift receives a sample for send-out testing. The test is ordered infrequently, so the laboratory scientist consults the reference laboratory manual for instructions on how to process the sample. The processing instructions say to send two samples, a serum sample and a 1:100 dilution of serum, both refrigerated. 1. The sample received by the laboratory is in a gold-topped tube with a serum separator. Is this sample adequate to process for the send-out test?  Select the best letter choice and give a brief explanation. A. Yes. The tube is adequate for a test requiring serum. B. No. This tube is not adequate for a test requiring serum. 2. The laboratory scientist confirms that the sample is adequate for processing. What is his next step? Choose the best letter answer and give a brief explanation.  A. Putting the sample in the refrigerator B. Centrifuging the sample C. Starting to make the required dilution for the test D. Mixing the…

To identify a positive control in your lab report, should you list any test tube with positive results? Why or why not? What is a negative control? Which substance is a negative control for each of the tests in this lab exercise?