Mineral & electrolyte markers
Markers on this page relate to minerals and electrolytes in blood and urine — sodium, potassium, calcium, magnesium and trace elements. Each entry explains what the test measures, what can affect it, and which tests are often looked at alongside it.
Anion Gap
Bicarbonate (CO2)
Calcium
Chloride
Chromium
Copper
Iodine
Magnesium, Blood
Molybdenum
Phosphorus
Plasma Osmolality
Potassium
Selenium
Sodium
Zinc