Chloride is the major extracellular anion. The majority of ingested chloride is absorbed, and the excess is excreted along with other ions into the urine.

Low levels of chloride are observed in the case of prolonged vomiting accompanied by the loss of hydrochloric acid (HCl), in some cases of metabolic acidosis in which there is an increased accumulation of organic anions, in critical cases of Addison’s disease, and in kidney disease resulting in loss of salt.

Elevated levels of chloride are observed in metabolic acidosis associated with prolonged diarrhea and with loss of sodium bicarbonate (NaHCO3), and in the case of renal tubular diseases in which there is a decreased excretion of hydrogen ion (H+), which causes in turn a decrease in the reabsorption of bicarbonate ion (HCO3–). Elevated levels of serum chloride are also implicated in certain cases of hyperparathyroidism.

24 hr urine collection container, no additive

How to collect a 24 hr urine sample

1. Record total urine volume on request form and/or aliquot.
2. Mix well
3. Transfer a 10 mL aliquot to a Urine aliquot transport vial/tube - 10mL (AHL)

Urine aliquot transport vial/tube - 10mL (AHL)

24 hour urine collection container, no additive

• Total volume

Refrigerated (preferred) - 7 days

Ambient - 7 days

• Improper labels (unlabeled or mislabeled)
• Hemolysis (some procedures)
• Delay in transport
• Improper storage temperature affecting results
• Inappropriate timing of collection
• Improper container
• Leaking container resulting in compromised specimen
• Quantity not sufficient (QNS)

Ion Selective Electrode

110 - 250 mmoL/24 hrs