ug/g stands for?

ug/g stands for?

• A. Microgram per gram
• B. Microgram per square foot
• C. Microgram per liter
• D. Microgram per kilogram

Answer: (A)

ug/g represents a concentration expressed as micrograms of contaminant per gram of material—a mass-per-mass (weight-per-weight) unit. This is a common way to report amounts in solids like soil or dust. In practical terms, 1 μg/g is the same as 1 mg/kg and about 1 part per million by weight, so a measurement of 5 μg/g means 5 micrograms of contaminant in each gram of material (equivalent to 5 mg per kilogram or ~5 ppm by weight). This unit is distinct from liquids (which use micrograms per liter) or surface-area measurements (which use micrograms per square foot).

ug/g represents a concentration expressed as micrograms of contaminant per gram of material—a mass-per-mass (weight-per-weight) unit. This is a common way to report amounts in solids like soil or dust. In practical terms, 1 μg/g is the same as 1 mg/kg and about 1 part per million by weight, so a measurement of 5 μg/g means 5 micrograms of contaminant in each gram of material (equivalent to 5 mg per kilogram or ~5 ppm by weight). This unit is distinct from liquids (which use micrograms per liter) or surface-area measurements (which use micrograms per square foot).