By Antonius Kettrup
This can be the 5th quantity in a global sequence of analytical tools for the selection of toxicants within the air on the office. All equipment are trustworthy, reproducable and meet the necessities for quality controls. The research of the degrees of damaging ingredients within the air inhaled by way of employees within the chemical and comparable operating environments is important to observe adherence to statutory focus limits and to guard the employees from the adversarial results of such ingredients.
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Additional resources for Analyses of Hazardous Substances in Air, Volume 5
With an injection syringe 1 mL of MIBK calibration gas (cf. Sect. 3) is then slowly injected into the pre-tube through the cap ± as far as the injection needle reaches ± within about 15 to 30 seconds. The pump should be allowed to run for at least one minute more. The tubes are then separated and the filled adsorption tube closed again with the caps. 015 L/min. The adsorption tube is connected to the membrane pump after removing the caps and fixed in the breathing area of a person or placed stationary at the sampling site.
3 Selectivity The selectivity of the method depends above all on the type of column used. In practice the given column has proved reliable. Toluene, a-chlorotoluene (benzyl chloride) and a,a,atrichlorotoluene (benzotrichloride) can be simultaneously determined using this method. In case of interfering components, a column with a different stationary phase should be used. 4 Recovery Recovery is dependent on both the relative humidity and the concentration. 14 mg/m3 (injection of 5 and 25 µL of a solution with a concentration of 114 µg/mL a,a-dichlorotoluene on the collection phase followed by drawing 20 L of air through the tube).
Solvent mixture 2: Mixture of 96 parts by volume of solvent mixture 1 and 8 parts by volume of aqueous ammonia. Stock solution: Solution of about 1 mg of 1,5-diaminonaphthalene per millilitre solvent mixture 2. 1 mg in a 25 mL volumetric flask. The flask is filled to the mark with the solvent mixture 2. 0, 5, 10, 15, 20 and 25 mg of 1,5-diaminonaphthalene per millilitre solvent mixture 1. A few millilitres of solvent mixture 1 are added to each 10 mL volumetric flask. Then 5, 10, 50, 100, 150, 200 and 250 µL of the stock solution are each pipetted into one of the volumetric flasks and then the flasks are filled to the mark with solvent mixture 1.
Analyses of Hazardous Substances in Air, Volume 5 by Antonius Kettrup