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Phosphates Information and Courses from MediaLab, Inc.

These are the MediaLab courses that cover Phosphates and links to relevant pages within the course.

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Laboratories Individuals

CLIA Chemistry / Urinalysis Review
Match urine color with substance that might have been responsible:View Page
Which two of these urine elements are found exclusively in acid urine:View Page

CLIA General Laboratory Review
Match urine color with substance that might have been responsible:View Page
The normal range for urine pH is:View Page
Match the urine sediment or crystal to the correct description.View Page

The Urine Microscopic: Microscopic Analysis of Urine Sediment
Common crystals which can be found in acid urine include:(Choose ALL of the correct answers)View Page
Normal Crystals

Normal crystals include uric acid, calcium oxalate, amorphous urates or phosphates, triple phosphate, ammonium biurate and calcium carbonate.

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Amorphous Urates

Amorphous urates appear as dark or yellow red granules while phosphates are white or colorless. The pH of the urine determines the type of amorphous crystals present. They may be urates in acid urine or phosphates in alkaline urine.

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Crystals in Normal Alkaline Urine

Crystals found in normal alkaline urine include triple phosphate, ammonium biurate, calcium carbonate, amorphous phosphates, and calcium oxalate. This slide shows an example of triple phosphate crystals. These may appear as four to six sided prisms resembling coffin lids. They indicate either stasis of the bladder or a stale sample.

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Please identify these crystals occurring in acid urine.View Page
Amorphous Urates

Amorphous urates can be dissolved in dilute sodium hydroxide. Amorphous phosphates will dissolve in dilute acetic acid. In either case, the bacteria will remain.

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