 | Determination of Ammonia (Phenolate) by Flow Injection Analysis | AN-0014.9 | This method is applicable to the automated colorimetric determination of ammonium in wet deposition samples by reaction with phenate. The reactions are specific for the ammonium (NH4+) ion. The applicable calibration range is 0.025-2.576 mg NH4+/L with a method detection limit of 0.005 mg NH4+/L.
The purpose of the method is to analyze for ammonium (NH4+) in National Atmospheric Deposition Program/National Trends Network (NADP/NTN) and NADP/Atmospheric Integrated Research Monitoring Network (AIRMoN) precipitation samples.
| 3/11/2008 | | 140 KB |
| Determination of Calcium, Magnesium, Sodium, Potassium by Inductively Coupled Plasma-Optical Emission Spectroscopy | AN-0016.5 | This method is applicable to the determination of calcium, magnesium, sodium and potassium in NADP/NTN and NADP/AIRMoN precipitation samples by inductively coupled plasma-optical emission spectroscopy (ICP-OES). Appropriate concentration ranges for each of the analytes are listed below. Samples are analyzed at room temperature.
This method is appropriate for the analysis of ions in wet deposition samples in the following ranges:
Ca = MDL- 10.0 mg/L
Mg = MDL - 2.0 mg/L
Na = MDL -10.0 mg/L
K = MDL - 2.0 mg/L
| 2/24/2009 | | 79 KB |
| Determination of Cl-, NO3-, and SO42- using Dionex ICS-2000 Ion Chromatographs | AN-0018.2 | Chloride (Cl-), sulfate (SO4 2-), and nitrate (NO3-) are determined by Dionex Autosuppressed Ion Chromatography (IC) for the National Atmospheric Deposition Program (NADP) wet deposition samples. As part of the scope of this SOP ANADP@ refers to National Trends Network and AIRMoN samples only. The working range for NO3- and SO42- is 0.000-6.00 mg/L and 0.000-1.50 mg/L for
Cl-. The Method Detection Limit for NO3- and SO42- is 0.015 mg/L, and for Cl- is 0.005 mg/L. | 7/26/2007 | | 193 KB |
| Determination of Conductivity | AN-0019.10 | The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) and NADP/Atmospheric Integrated Research Monitoring Network (NADP/AIRMoN) samples are measured for conductivity using unfiltered aliquots. Approximately 300 samples are measured each week. | 5/7/2009 | 5/7/2009 | 288 KB |
| Determination of Orthophosphate by Flow Injection Analysis | AN-0021.9 | This method is applicable to the automated colorimetric determination of orthophosphate in wet deposition samples by ascorbic acid reduction. The reactions are specific for the orthophosphate (PO43-) ion. The applicable calibration range is 0.010-0.200 mg/L (PO43-) with a method detection limit of 0.005 mg/L PO43-.
The purpose of the method is to analyze for orthophosphate (PO43-) in National Atmospheric Deposition Program/National Trends Network (NADP/NTN) and NADP/Atmospheric Integrated Research Monitoring Network (AIRMoN) precipitation samples.
| 3/11/2008 | | 174 KB |
| Determination of Passive Ammonia (Phenolate) by Flow Injection Analysis | AN-0022.0 | This method is applicable to the automated colorimetric determination of ammonium in extracts from the Radiello® passive diffusion gas samplers by reaction with phenate. The reactions are specific for the ammonium (NH4+) ion. The applicable calibration range is 0.025-2.576 mg NH4+/L with a method detection limit of 0.006 mg NH4+/L.
The purpose of the method is to analyze field samples from a research network of air monitoring sites for passive ammonia.
| 10/7/2008 | | 140 KB |
| Determination of pH | AN-0023.12 | The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) and NADP/Atmospheric Integrated Research Monitoring Network (NADP/AIRMoN) samples are measured for pH using unfiltered aliquots. Approximately 300 samples are measured each week. | 4/8/2009 | 4/8/2009 | 442 KB |
| Determination of Total Nitrogen | AN-4024.1 | This method is applicable to the automated colorimetric determination of total nitrogen in wet deposition samples and is appropriate for the analysis of dissolved organic nitrogen in wet deposition samples in the following range: 0.009 – 2.0 ppm N. | 7/22/2009 | 7/22/2009 | 177 KB |