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Class

Constituent

Amount/normal concentration range

Electrolytes (inorganic)

Cations

Sodium (Na+)

136–145 mEq/L

Potassium (K+)

3.5–5.0 mEq/L

Calcium (Ca2+)

4.3–5.2 mEq/L

Magnesium (Mg2+)

1.2–1.8 mEq/L

Iron (Fe3+)

60–160 μg/dL

Copper (Cu2+)

70–155 μg/dL

Hydrogen (H+)

35–45 nmol/L (pH = 7.35–7.45)

Anions

Chloride (Cl)

98–106 mEq/L

Bicarbonate (HCO3)

23–28 mEq/L

Lactate

0.67–1.8 mEq/L

Sulfate (SO42−)

0.9–1.1 mEq/L

Phosphate (HPO42− mostly)

3.0–4.5 mg/dL

Proteins

Total (7% of plasma weight)

6–8 g/dL

Albumin

3.4–5.0 g/dL

Globulins

2.2–4.0 g/dL

Fibrinogen

0.3 g/dL

Nutrients

Glucose

80–120 mg/dL

Total amino acids

40 mg/dL

Cholesterol

150–200 mg/dL

Phospholipids

150–220 mg/dL

Triglycerides

35–160 mg/dL

Waste products

Uric acid (from nucleic acids)

2.6–7.2 mg/dL

Blood urea nitrogen (from protein)

8–25 mg/dL

Creatinine (from creatine)

0.2–0.9 mg/dL

Bilirubin (from heme)

0.1–1.2 mg/dL

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