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).
Cover the pan and cook for about 10 minutes, or until soft but not brown, lifting the lid occasionally to stir. While the leeks and onion are cooking, peel the potatoes and cut them into 5mm (Â¼ in) slices. When the leeks and onion are ready, add the potato slices to the pan.