TITLE: ACE-Asia Results from Ground Stations at Kosan and Zhenbeitai Author(s):PI: Richard Arimoto CEMRC/New Mexico State University 1400 University Drive Carlsbad, NM 88220 Phone: 505-234-5503 Fax: 505-887-3051 Email: arimoto@cemrc.org Note: Several samples (#16, 24, 31, 35 & 60) had very low flow volumes. Data for these samples are unreliable and should not be used. Data for these samples have been removed from the updated files. Sorry for any inconvenience. -RA 2/10/2003 1.0 DATA SET OVERVIEW: This data set contains the results of elemental and major ion analyses of aerosol samples collected at several of the ACE-Asia ground stations. The samples were collected starting in the spring of 2001 at Kosan, Korea (33.29—N, 126.17—E) and Zhenbeitai (38.3—N, 109.7—E), a site near a major dust source region in China. A high-volume total suspended particle (TSP) sampler was used at Kosan, and there the aerosols were collected on Whatman 41 filters. This same sampler was used during the PEM-West Program (Arimoto et al., 1997). A modified IMPROVE-type, low- volume sampler was used at Zhenbeitai, and it collected particles less than 2.5 mm in aerodynamic equivalent diameter (PM2.5) on either Teflo or Metricel filters depending on the analytes of interest (Teflo for major ion analyses, Metricel for trace element analyses). Portions of the high-volume filters were prepared for the elemental analyses using a mixture of acids (HNO3, HCl, HF, and H2O2) in a microwave digestion unit. Aliquots of the low-volume filters were prepared with the same mixture of acids in clean plastic vessels in an ultrasonic bath because the filter matrix was not compatible with the microwave digestion vessels. These samples were analyzed by using an inductively-coupled plasma mass spectrometer (ICP-MS) following US EPA Method 200.8. For the aerosol ion analyses, the filters were extracted with 18 Mã de- ionzed water (isopropanol was used as a wetting agent for the Teflo filters). Anion (sulfate, nitrate, methanesulfonate, and chloride) and cation (Na+, K+, Mg2+, and Ca2+) concentrations were determined using a ion chromatography (IC) system. 2.0 INSTRUMENT DESCRIPTION: Ion analyses for anions and cations were performed by Dionex 500 ion chromatography system with chemical suppression and conductivity detection. Anions: F, Cl,No3,Po4,So4 (AS14 column) Methanesulfonate, MSA (AS11-HC column) Cations: Li, Na, K, Mg, Ca (CS-12A column) Elemental analyses performed for most elements were by a Perkin- Elmer Elan 6000 inductively-coupled plasma mass spectrometer. Elements Se and As were analyzed using a Perkin-Elmer 5100PC atomic absorption spectrometer. 3.0 DATA COLLECTION AND PROCESSING: Sample collection information provided above. The following are a list of quality control, sample preparation and sample analysis procedures: 1. Quality Assurance Plan for the Environmental Chemistry Laboratory. EC-QAP-001-003-121198. 2. Environmental Chemistry Data Quality Objectives. EC-DQO-016-000-050201 3. Sample Preparation for the Analysis of Metals and Trace Elements by Inductively-Coupled Plasma Mass Spectrometry and Atomic Absorption Spectrometry. EC-PROC-007-005-040599. 4. Analysis of Waters, Air filters, Soils and Sediments by Inductively-Coupled Plasma Mass Spectrometry. EC-PROC-009- 005-031099. 5. Cation Analysis by Ion Chromatography. EC-PROC-01-004-050798. 6. Sample Preparaton for the Analysis of Anions, MSA and Cations by Ion Chromatography. EC-PROC-012-004-031999 7. Anion Analysis by Ion Chromatography. EC-PROC-013-004-071398 4.0 DATA FORMAT: All data is archived in space delimited text files. A list of variables is summarized below: DATE/TIME/ON - Date and time the sampler was turned on in UTC. DATE/TIME/OFF - Date and time the sampler was turned off in UTC. SAMPLE NUMBER - Assigned sample number. FLOW VOLUME - Amount of air flow during the time interval the sampler was on for each filter. The units are m^3. LIST OF ANALYTES - the units for concentration of each analyte are ug/m3. The concentration of -5.55 means the value of the analyte is less than Minimum Detection Limit (MDL). The data version is V 1.0 and the version date is 05-16-02 5.0 DATA REMAKS: These results are preliminary pending final validation and verification. 6.0 REFERENCES: 1. Arimoto, R., R. A., Duce, J. M. Prospero, D. L. Savoie, R. W. Talbot, J. E. Dibb, B. G. Heikes, B. J. Ray, N. F. Lewis and U. Tomza, Comparisons of Trace Constituents from Ground Stations and the DC-8 Aircraft during PEM-West B, Journal of Geophysical Research, 102, 28,539-28,550, 1997. 2. EPA Method 200.8 "Determination of Metals and Trace Elements in Water and Wastes by Inductively-Coupled Plasma Mass Spectrometry" Revision 5.4, 1994. 3. EPA Method 6020 CLP-M "Determination of Metals and Trace Elements in Water and Wastes by Inductively-Coupled Plasma Mass Spectrometry" version 8.0, 1996. 4. EPA Method 3052M "Microwave-assisted Acid Digestion of Siliceous and Organically Based Matrices" Update III. 5. EPA Method 3015 "Microwave-assisted Acid Digestion of Aqueous Samples and Extracts" Revision 0, September 1994. 6. EPA SW846 Method 7000A "Atomic Absorption Methods" Revision 1, July 1992. 7. EPA SW846 Method 7062 "Antimony and Arsenic", Revision 0, September 1994. 8. EPA SW846 Method 7742 "Selenium" Revision 0, September 1994. 9. EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography" Revision 2.1, August 1993.