EPA method 1312

Knowledge graph centered on EPA method 1312 with 16 nodes and 41 connections. Top connected: Bacteria, drive-point piezometer groundwater sampling, metagenome-assembled genome, hyporheic zone, DNA metabarcoding.

Method synopsis

Method adapted from EPA method 1312 for solid phase non-volatile extractions in wastewater using synthetic acid precipitation to simulate metal mobility under rainwater conditions.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Using geochemical indicators to distinguish high biogeochemical activitiy in floodplain soils and sediments (2016), Sci Total Environ. Implementations in other papers (listed below) may differ.

1. Synthetic precipitation leaching
   Synthetic precipitation leach tests were conducted on East River samples to determine metal mobility. The synthetic precipitation consisted of 60:40 H₂SO₄:HNO₃ in Milliq water adjusted to a pH of 4.2 ± 0.05 to simulate metals released as rainwater leaches through soil. The extraction fluid was combined with dry sediment passed through a 0.991 cm sieve in a 20:1 ratio of extractant to sediment and shaken for 18 h. The extract was sampled, filtered to 0.45 μm, and acidified with trace metal grade for analysis by ICP-AES.
   Quantities: 60:40 H₂SO₄:HNO₃ ratio, pH 4.2 ± 0.05, 20:1 extractant to sediment ratio, 0.991 cm sieve, filtered to 0.45 μmDuration: Shaken for 18 hoursConditions: pH adjusted to 4.2 ± 0.05 to simulate rainwater
   Equipment: H₂SO₄, HNO₃, Milliq water, pH meter, 0.991 cm sieve, 0.45 μm filters, trace metal grade chemicals, ICP-AES

Typical Equipment

• H₂SO₄
• HNO₃
• 0.991 cm sieve
• ICP-AES

Output Measurements

• leachable metal concentrations

Papers Using This Protocol (1)

Species Studied With This Protocol