Quantitative Microdetermination of Gaseous Ammonia by Its Absorption at 204.3 Mμ

Abstract

A direct spectrophotometric method for the quantitative determination of ammonia gas at atmospheric pressure utilizes the absorption maximum of ammonia at 204.3 m/x (e, 3127) which allows determinations from 7 p.p.m. (5 y per liter) to 1000 p.p.m. of ammonia in air.

Investigation of Laboratory-Scale and Pilot-Scale Attached Growth Ammonia Removal Kinetics at Cold Temperature and Low Influent Carbon

“…Grab samples were acquired every second day in the pilot-scale systems throughout the experimental phase. Autosampler NH 4 + -N measurements were performed using an autosampler, ammonia analyzer (F070905 Tethys Instruments, NY), according to quantitative microdetermination of gaseous ammonia by absorption (Gunther et al 1956). Samples were analyzed by the autosampler analyzer every hour in the laboratory-scale reactors and the pilot systems.…”

Fungicides for Packaged Foods, Generation of Ammonia for In-Package Fumigation of Foodstuffs

“…Citrus fruits packed in fiberboard cartons may be protected with gaseous ammonia (27, 22), which according to Klotz Range values from continuous cross-calibrated hygrothermograph records over 12-dav period. 4 In nonvented cartons.…”

Cocurrent Gas-Liquid Contacting in Packed Columns

“…), enabling large scale experiments to be operated safely with the gas discharge directly to atmosphere. This technique utilized the ultraviolet absorption characteristics of ammonia at 204.3 mp (Gunther et al, 1956(Gunther et al, , 1958; Kolbezen, 1964). A Beckman Model DUR recording spectrophotometer was used with flow through ultraviolet quartz sample cells of 10-and 100mm.…”