Detailed unit conversion of concentration
Medical Oxygen Generator,Oxygen Generator Medical,Oxygen Generator 10 Liter,Medical Use 60Nm3/H Oxygen Generator Jiangsu Minnuo Group Co.,Ltd , https://www.mngroupcn.com
1. Concentration of mass percentage concentration solution The mass percentage concentration expressed as a percentage of the mass of the total solution is defined by the symbol %. For example, 25% glucose injection means that 25 grams of glucose is contained in 100 injections. Percent Mass Concentration (%) = Solute Mass / Solution Quality 100%
2. Volume concentration (1) The molar concentration of the solution is expressed as the molar concentration of the solute contained in 1 liter of solution, expressed in symbol mol, for example, 1 liter of concentrated sulfuric acid containing 18.4 mole of sulfuric acid. 18.4mol.
Molarity (mol) = moles of solute / volume of solution (l)
(2) Concentration of Normal Concentration (N) Solution The normal concentration expressed as the equivalent number of solute contained in 1 liter of solution is indicated by the symbol N.
For example, 1 liter of concentrated hydrochloric acid contains 12.0 gram equivalent of hydrochloric acid (HCl), and the concentration is 12.0N.
Equivalent concentration = gram equivalent of solute / volume of solution (litre)
3. Mass-Volume Concentration The concentration expressed as the mass of solute contained in a unit volume (1 cubic meter or 1 liter) solution is called a mass-volume concentration and is expressed by the symbol g/m3 or mg/L. For example, if 1 liter of chromium-containing wastewater contains 2 mg of hexavalent chromium, then the concentration of hexavalent chromium is 2 mg/L (mg/L).
Mass-volume concentration = mass of solute (grams or milligrams) / volume of solution (cubic meters or liters)
4, the conversion formula of the concentration unit:
1) normal concentration = 1000.d. mass percent concentration / E
2) mass percentage concentration = normal concentration E/1000.d
3) Molar concentration = 1000.d mass percent concentration / M
4) Mass % Concentration = Mass - Volume Concentration (mg/L) / 104.d
5) Mass-volume concentration (mg/L) = 104 mass percent concentration 5, ppm is a percentage by weight, ppm = mg/kg = mg/L ie: 1 ppm = 1 ppm = 1000 ug/L
1ppb=1ug/L=0.001mg
Where: E-solute gram equivalent;
D—the specific gravity of the solution;
M-solute molar mass;
(b) Gas Concentrations Atmospheric contaminants, the usual volumetric concentration and mass-volume concentration, are expressed in the atmosphere.
1. Volumetric concentration The volumetric concentration is expressed as the volume (cubic centimeters) or (ml/m3) of the contaminant contained in the atmosphere per cubic meter. The commonly used method is ppm, that is, 1 ppm = 1 cubic centimeter per cubic meter. 10-6. In addition to ppm, there are ppb and ppt. The relationship between them is:
1ppm=10-6=one millionth, 1ppb=10-9=one billionth,
1ppt=10-12=one trillionth, 1ppm=103ppb=106ppt
2. Mass-Volume Concentration The concentration expressed by the mass of contaminants per cubic meter of air is mass-volume concentration and the unit is mg/m3 or g/m3.
Its conversion relationship with ppm is:
X=MC/22.4
C=22.4X/M
Where: X—concentration value of the pollutant in milligrams per standard cubic meter;
C—concentration in ppm of pollutants;
M—the fractional amount of pollutants.
From the above formula can get the following relationship:
1ppm=M/22.4 (mg/m3)=1000.m/22.4ug/m3
Example 1: Find the ppm concentration of hydrogen fluoride of 30 mg/Nm3 under standard conditions.
Solution: The molecular weight of hydrogen fluoride is 20, then:
C=30.22.4/20=33.6ppm
Harbin Yuda Electronic Technology Co., Ltd. produces concentration meters, handheld concentration meters, moisture analyzers, and infrared moisture meters.
Example 2: It is known that the concentration of sulfur dioxide in the atmosphere is 5 ppm, and the concentration is expressed in mg/Nm3.
Solution: The molecular weight of sulfur dioxide is 64.
X=5.64/22.4 mg/m3=14.3 mg/m3
3, in the soil, animals and plants, solid waste ppm, ppb and mass content conversion:
1ppm=1mg/kg=1000ug/kg
1ppb=1ug/kg=10-3mg/kg
1mg/kg=1ppm=1000ug/kg
1ug/kg=1ppb=10-3ppm