How Do You Spell PARTS PER THOUSAND?

Parts per thousand (ppt) is a unit of measurement commonly used to express the concentration or proportion of a substance within a solution or mixture. It represents the number of parts of a certain constituent substance present in one thousand parts of the whole solution or mixture.

Specifically, parts per thousand is calculated by dividing the quantity of the component substance by the total quantity of the solution or mixture, and then multiplying the result by one thousand. The resulting value is expressed as parts per thousand or "‰" (per mille) symbolically. For example, if a solution contains 25 grams of salt dissolved in 1000 grams of water, the concentration of salt would be 25 parts per thousand.

This unit of measurement is often used for describing small proportions or concentrations that are too small to be expressed as percentages. It is commonly employed in various scientific fields such as chemistry, biology, and environmental science to express concentrations of solutes in solutions. Additionally, parts per thousand can be used to describe the strength of alloys, salinity levels in water bodies, and the alcohol content in beverages.

In summary, parts per thousand is a quantitative measurement indicating the ratio of a specific component substance to the total quantity of a solution or mixture, expressed as the number of parts present in one thousand parts of the whole.