National Institute for Occupational Safety and Health

“ Hydrazine is carcinogenic, toxic, and flammable, and can be absorbed through the skin [5] . Acetic acid and methanol are flammable. Wear gloves, handle compounds in a well-ventilated fume cabinet, avoid inhalation of vapors, and protect compounds from sparks and flames. ”

“ Connect the outlet of the sampler and the inlet of the pump to a tube packed with glass wool to protect the pump from splashover. Calibrate the personal sampling pump with sampler in line. Sample at 0.2 to 1.0 L/min for a sample size of 7 to 100 L. Transfer the solution from the bubbler to a glass vial, rinsing both the bubbler stem and body with 1-mL portions of 0.1 M HCl. Cap the vial securely for shipment.
SAMPLE PREPARATION: 5. 6. 7. 8. 9. 10. 11.
Transfer bubbler solution to a 50-mL volumetric flask. Rinse vial with 1 mL 0.1 M HCl, and add rinse to the flask. ”

“ Methanol, reagent grade.* Calibration stock solution, 1.0 mg/mL. Dissolve 0.10 mL hydrazine* in methanol to make 100 mL solution. Solution of p-dimethylaminobenzaldehyde in methanol, 0.168 M. Dissolve 12.5 g p-dimethylaminobenzaldehyde in methanol to make 500 mL solution. Glacial acetic acid.* Sodium hydroxide solution, 1.8 M. Dissolve 7.2 g NaOH in distilled water to make 100 mL solution.
1. Sampler: midget bubbler, glass, with 15 mL 0.1 M HCl. 2. Glass tube, 5 cm x 6-mm ID, packed loosely with glass wool. 3. Personal sampling pump, 0.2 to 1 L/min, with flexible connecting tubing. 4. ”