A service laboratory developed a testing procedure for the determination of four heavy metals in drinking water. The laboratory considers extending the test scope to cover environmental waters. In this situation, the limits of detection of (LOD) and quantification (LOQ) of the method should only be revised. True or Flase?
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A service laboratory developed a testing procedure for the determination of four heavy metals in drinking water. The laboratory considers extending the test scope to cover environmental waters. In this situation, the limits of detection of (LOD) and quantification (LOQ) of the method should only be revised.
True or Flase?
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- 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 specimens 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? 3. Another symbol was seen on the box containing the test devices for Cocaine. What does it mean?Provided with the following data, compute the corresponding CFU/ml of the original culture. Assume that spread plate technique was done. Show your solutions. 10-1 10-2 10-3 10-4 10-5 Plate 1 TNTC 340 132 45 19 Plate 2 TNTC TNTC 242 80 25 Plate 3 TNTC 280 90 22 2D, Inc., uses three departments to produce a detergent. The Finishing Department is the third and last step before the product is transferred to storage. All materials needed to give the detergent its final composition are added at the beginning of the process in the Finishing Department. The company uses FIFO costing. The following data for the Finishing Department for October have been made available: Production data: In process, October 1 (labor and factory overhead, 75% complete) 10,000 litres Transferred in from preceding department 40,000 litres Finished and transferred to storage 35,000 litres In process, October 31 (labor and factory overhead, 50% complete)15,000 litres Additional data: Work-in-process inventory, October 1: Cost from preceding department $38,000Cost from this department: 21,500 Materials 39,000 Labor 42,000 Factory overhead $140,500 Transferred in during October $140,500Cost added in this department: Materials $70,000Labor 162,500Factory…