Analysis of atmospheric ammonia and particulate ammonium by a

ADDITIONS AND CORRECTIONS 1988, Volume 22, Pages 948-952

S. Rapsomanikis, M. Wake, A.-M. N. Kitto, and Roy M. Harrison*: Analysis of Atmospheric Ammonia and Particulate Ammonium by a Sensitive Fluorescence Method. On page 948, the limit of detection established with standard solutions of NH4+is 0.9 ng mL-l with a 500-pL sample loop and not 9 ng as stated. 1988, Volume 22, Pages 908-915 Marcia G. Nishioka,* Corinne C. Howard, Denise A. Contos, Louis M. Ball, and Joellen Lewtas: Detection of Hydroxylated Nitro Aromatic and Hydroxylated Nitro Polycyclic Aromatic Compounds in an Ambient Air Particulate Extract Using Bioassay-Directed Fractionation. Page 910, column 1,line 11 from the bottom: HN-AR were quantified in separate analyses against calibration curves of authentic material with either l-N02-pyrene-d,, 2,4-dimethylphenol-3,5,6-d3, or 4-NOz-phenol-d4as internal standard. Page 910, column 2, line 28 from the bottom: The HNBenz and HN-To1 isomers were resolved chromatographically (2-OH-4-NOZ-Toland 3-OH-5-N02-Tol resolved at a temperature program rate of 6 OC/min) ... Table 11: l-OH-3-NO2-benzene,RRT = 0.384,139 (100); 123 (21); 122 (ND); 109 (20); 93 (49); 81 (47). 1-OH-4NO2-benzene, RRT = 0.395, 139 (100); 123 (19); 122 (ND); 109 (36); 93 (23); 81 (20)“. “l-OH-2-N02-benzenetentatively identified on basis of relative retention as component with RRT = 0.288. Table IV: l-OH-3-NO2-benzene, concentration in extract 30 pg/g, concentration in air 0.05 ng/m3. 1-OH-4NO2-benzene, concentration in extract 470 pg/g, concentration in air 0.8 ng/m3. Delete footnote b.

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Environ. Sci. Technol., Vol. 23, No. 2, 1989