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Different disciplines have different conventions as to whether absorbance is decadic (10-based) or Napierian (e-based), i.e., defined with respect to the transmission via common logarithm (log 10) or a natural logarithm (ln). The molar absorption coefficient is usually decadic.
For example, on a certain monitor, the horizontal distance between the upper limits for parathyroid hormone in pmol/L and pg/mL may be 7 cm, with the mass concentration to the right. A molar concentration of, for example, 5 pmol/L would therefore correspond to a mass concentration located 7 cm to the right in the mass diagram, that is ...
For example, in the 1930s Widmark measured alcohol and blood by mass, and thus reported his concentrations in units of g/kg or mg/g, weight alcohol per weight blood. Blood is denser than water and 1 mL of blood has a mass of approximately 1.055 grams, thus a mass-volume BAC of 1 g/L corresponds to a mass-mass BAC of 0.948 mg/g.
The concept of Ct was first proposed by Fritz Haber and is sometimes referred to as Haber's law, which assumes that exposure to 1 minute of 100 mg/m 3 is equivalent to 10 minutes of 10 mg/m 3 (1 × 100 = 100, as does 10 × 10 = 100).
England and Wales and Northern Ireland: 80 mg/100 mL (~0.08% BAC) alcohol in blood, 35 μg/100 mL alcohol in breath or 107 mg/100 mL alcohol in urine. [131] [132] Scotland: 50 mg/100 mL (~0.05% BAC) alcohol in blood or 22 μg/100 mL alcohol in breath (legislation became effective from 5 December 2014) [133]
Citrinin and its major metabolite could positively be detected in respectively 82% and 84% of all urine samples. The levels measured for CTN ranged from 0.02 (limit of detection, LOD) to 0.08 ng/mL and for HO-CTN from 0.05 (LOD) to 0.51 ng/mL. The average urine level was 0.03 ng/mL for CTN and 0.06 ng/mL for HO-CTN.
0.9 mg/L 0,2 mg/L no limit listed 0.03 mg/L Antimony Sb 0.02 mg/L 5.0 μg/L 6.0 μg/L " 6.00 μg/L Arsenic As 0.01 mg/L 10 μg/L 10 μg/L 50 μg/L 10.0 μg/L 0.05 mg/L Barium Ba 1.3 mg/L ns 2 mg/L " 1.00 mg/L Benzene 0.01 mg/L 1.0 μg/L 5 μg/L " " Benzo(a)pyrene " 0.010 μg/L 0.2 μg/L 0.0028 μg/L " Beryllium Be " Boron B 2.4 mg/L 1.0 mg/L ...
The gold number is the minimum weight (in milligrams) of a protective colloid/lyophilic colloid required to prevent the coagulation of 10 ml of a standard hydro gold sol when 1 ml of a 10% sodium chloride solution is added to it. [1] It was first used by Richard Adolf Zsigmondy in 1901.