Final answer:
A fluid sample analysis, particularly in pharmaceutical manufacturing, involves taking the sample while the machine is operational. About quality control, a chemist checks the accuracy and precision of dispensing machines by measuring the volumes of liquid dispensed and comparing them to the expected volume.
Step-by-step explanation:
When analyzing a fluid sample from machinery, it is typically recommended to take the sample from the middle of the reservoir while the machine is still in operation. In the context of a pharmaceutical company, a quality control chemist may perform this action as part of checking the accuracy and precision of machines that are designed to dispense specific volumes of liquid, such as cough syrup.
To assess the performance of these dispensing machines, the chemist uses each one to fill a set number of bottles and then measures the actual volumes dispensed. This procedure ensures that the quality control measures adhere to industry standards for accuracy and precision, which are critical in pharmaceutical manufacturing.
To further illustrate, suppose a quality control chemist is checking three machines that should each dispense 10 ounces (296 mL) of cough syrup. After operating each machine to fill five bottles, the actual volume dispensed in each bottle is recorded and analyzed. This data allows the chemist to identify any deviations from the desired volume of 10 ounces, thus determining the machines' accuracy (how close the measurements are to the target value) and precision (how similar the measurements are to each other when repeated under the same conditions).