Arsenic Test

Arsenic is a naturally occurring metalloid, meaning it shares properties of both metals and non-metals. It’s found in soil, groundwater, certain foods, and even industrial materials. While arsenic can exist in harmless organic forms (like in seafood), the toxic concern is mainly with inorganic arsenic—the form that contaminates drinking water, rice, and soil.

Inorganic arsenic is particularly harmful because it interferes with how our cells produce energy. One form, trivalent arsenic (As³⁺), disrupts important enzymes by binding to parts of the enzyme called sulfhydryl groups—these are critical chemical structures that help the enzyme work. This disruption blocks cellular respiration, the process cells use to turn food into energy. Another form, pentavalent arsenic (As⁵⁺), mimics phosphate, a building block for energy molecules like ATP. This trickery leads to decreased energy production and widespread cellular dysfunction.

The most dangerous form is arsine gas, a rare byproduct in certain industrial settings like semiconductor manufacturing. This gas enters the lungs, then destroys red blood cells, leading to hemolysis—a condition where these cells break apart, potentially causing kidney failure and death within hours.

Arsenic also produces reactive oxygen species (ROS), which are harmful molecules that cause oxidative stress—a kind of chemical imbalance that damages DNA, proteins, and cell membranes. Over time, this contributes to aging, cancer, and organ failure. In fact, arsenic is classified as a Group 1 carcinogen, meaning there is strong evidence it causes cancer in humans.

The effects of arsenic depend on the dose, duration, and form of exposure.

• Acute poisoning, such as from high-dose ingestion or industrial gas exposure, causes vomiting, watery diarrhea, low blood pressure, and in some cases heart rhythm problems or seizures.
• Inhaled arsine gas can cause red-colored urine, jaundice, kidney failure, and death within hours.
• Chronic exposure from low-level ingestion—especially through drinking water—can go unnoticed for years. It leads to numbness in the hands and feet, skin darkening (hyperpigmentation), thickened skin (keratosis), and a higher risk of cancer, particularly in the lungs, skin, bladder, and liver. Some symptoms, like Mees’ lines (white bands across fingernails), appear weeks after exposure.
• In children and developing fetuses, chronic arsenic exposure can interfere with growth, immunity, and brain development.

Treatment begins with eliminating the source of exposure. For acute poisoning, chelation therapy (using agents like dimercaprol or succimer) can bind arsenic and help the kidneys excrete it. However, chelation is not effective for past exposure or latent damage, such as cancer or neuropathy. For arsine gas poisoning, there is no antidote—treatment focuses on supportive care, including blood transfusions and kidney support like dialysis.