Random Urine Collection for Urinalysis. Random urine samples are used for urinalysis, which can screen and diagnose metabolic disorders and urinary tract infections. Your doctor may order urinalysis to determine, for example, the cause of bloody urine, abdominal pains or burning sensations associated with urination.
1 Place potato slices into a large bowl of cold water as you slice. 2  Drain, and rinse, then refill the bowl with water, and add the salt. 3  Let the potatoes soak in the salty water for at least 30 minutes. 4  Drain, then rinse and drain again. 5  Heat oil in a deep-fryer to 365 degrees F (185 degrees C).
1 Preheat canola oil to a frying temperature of 375 Â°F (190 Â°C). To cook French fries properly, it is important to maintain this frying temperature. You may wish to increase the temperature slightly before adding potatoes as oil temperature will drop when food is added.  2. Fry for 4 to 6 minutes to blanch.