Dataset: GP16 Acetic Acid Leachable Trace Metals from Aerosols
Deployment: TN303

Data have been corrected for field and analytical blank. Reported aerosol trace element concentrations values have been normalized to the volume of air filtered during sample collection. Fractional solubility values are relative to total particulate aerosols. Each sample collection period (n = 17) produced 36 replicate filters. Three of those filters were digested to produce three replicate measurements of total particulate aerosols, and a second set of three filters were leached with acetic acid and a reducing agent to produce three replicate measurements of aerosol leachable trace metals. In the majority of cases, the triplicates were above the field blank value and were in good agreement. Data from the three replicates were averaged and reported along with the standard deviation. Outliers and replicate samples that were below the field blank value were not included in the mean. 

Quality flag codes:
Codes follow the SeaDataNet scheme (https://www.geotraces.org/geotraces-quality-flag-policy/)
BDL = below detection limit;
0 = No QC performed;
1 = Good data;
2 = Probably good data;
3 = Probably bad data that is potentially correctable;
4 = Bad data;
5 = Value changed;
6 = Sample < blank;
8 = Interpolated value;
​9 = Missing value.

BCO-DMO Processing:
- modified parameter names to conform with BCO-DMO naming conventions;
- replaced missing data values of -999 and -9999 with "nd";
- added date-time columns in ISO8601 format.

Version History:
26 May 2020 (current version) - replaced entire dataset using GEOTRACES DOoR format.
19 Jul 2017 - original version.