By Antonius Kettrup
This can be the 5th quantity in a world sequence of analytical tools for the selection of toxicants within the air on the place of work. All tools are trustworthy, reproducable and meet the necessities for qc. The research of the degrees of harmful elements within the air inhaled by means of employees within the chemical and comparable operating environments is critical to observe adherence to statutory focus limits and to guard the employees from the adversarial results of such elements.
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Additional resources for Analyses of Hazardous Substances in Air, Volume 5
Solvent mixture 1: Mixture of acetonitrile/water (1 : 1 v/v). 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.
1 µL of the blank solution is injected into the gas chromatograph. 5 min Helium, approx. 1 Calibration 1 mL of each of the calibration solutions described in Sect. 3 are added to the contents of an unloaded Tenax tube in beaded rim vials and analysed as described in Sect. 1. Analytical Methods 44 The calibration curve is obtained by plotting the measured peak areas or peak heights against the a-chlorotoluene weights contained in the various calibration solutions. The calibration curve is linear in the given concentration range.
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