Alphabetical Test listing


Lithium heparin (Li hep) plasma
1.0 mL
0.2 mL

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting


Spin within two (2) hours of sample collection


Lt green plasma separator (PST)


Immediately following collection, thoroughly mix sample by gently inverting 5 times

  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection

Gold serum separator (SST) tube


Refrigerated (preferred) - 4 days

Ambient - 1 day

Frozen - 12 months

  • Improper labels (unlabeled or mislabeled)
  • Hemolysis
  • Improper anticoagulant or ratio
  • Delay in transport
  • Improper storage temperature affecting results
  • Improper container
  • Leaking container resulting in compromised specimen
  • Quantity not sufficient (QNS)
AHL - Chemistry: C
1 day


 Age  Range (mg/dL)
 10 days  4.5 - 9.0
 1 year  4.5 - 6.5
 12 years  3.4 - 5.9
 Adult  2.3 - 4.7

Low:  < 1.0 mg/dL

High: >10.0 mg/dL


The human body contains nearly a kilogram of phosphorus. Nearly 80% of this amount is in the form of calcium phosphate salts which are contained in, and give rigidity to, bone. The rest is distributed through all other cells of the body where its role is important and complex. Much of the metabolism of carbohydrates involves esterification of intermediary metabolites with phosphate. In fact, the metabolism of all food terminates in the formation of adenosine triphosphate (ATP). The breakdown of ATP to ADP produces the energy needed for chemical reactions involved in cell function, maintenance, and growth. Phosphate is also an integral part of the structure of the nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) which transfer genetic information.

Abnormal serum phosphate levels are most commonly seen in kidney, bone, and parathyroid diseases. Calcium and phosphorus in serum usually exhibit a reciprocal relationship. Increased serum phosphorus may occur in hypervitaminosis D, hypoparathyroidism, and renal failure. Reduced serum phosphorus levels are seen in rickets (Vitamin D deficiency), hyperparathyroidism, and Fanconi’s syndrome.