One part per billion (ppb) denotes one part per 1,000,000,000 parts, one part in 109, 1/1,000,000,000 * 100% = 0.0000001% (or 1% = 10,000,000 ppb) and a value of 1 × 10−9. This is equivalent to one drop of water diluted into 250 chemical drums (50 m3), or about three seconds out of a century.
300ng/ml is 300 micrograms per litre which is the same as 300ppb (parts per billion), or 0.3ppm (parts per million)
There are 1,000,000,000 micrograms in a kilogram. This actually means parts per billion. Parts per million would be mg/kg. So to get here, you need to divide by 1000.
[parts] per hundred.
-- take the number of parts per thousand-- multiply it by 1,000-- the answer is the number of parts per million
A billionth is one of a billion equal parts.
Parts Per Billion
Nickel is an element. Therefore, in any nickel item it is 1 billion parts per 1 billion or 1 million parts per million.
Parts Per Billion - 2014 is rated/received certificates of: USA:R
1000parts per billion = how much gold per to n in grams
50ppb is equal to 0.05ppm
Parts Per Billion - 2009 SUSPENDED was released on: USA: 2009 (limited)
about 0.003 parts per billion in the earth's crust.
You probably mean "abundance of mercury on Earth". Its abundance in Earth's crust is 85 parts per billion by weight, 9 parts per billion by moles. The most abundant naturally forming isotope is 202Hg is at 29.86%.
48.5ppb equates to 0.0485ppm
58 ppb = .058 ppm
1 part per billion by weight, 0.2 parts per billion by moles.
parts per billion