Standard Test Methods for Moisture, Ash, and
Organic Matter of Peat and Other Organic Soils

By ASTM D2974C

Scope:

These test methods cover the measurement of moisture content, ash content, and organic matter in peats and other organic soils, such as organic clays, silts, and mucks.

Method A — Moisture is determined by drying a peat or organic soil sample at 105°C. The moisture content is expressed either as a percent of the oven dry mass or of the as-received mass.

Method B — This is an alternative moisture method which removes the total moisture in two steps: (1) evaporation of moisture in air at room temperature (airdrying), and (2) the subsequent oven drying of the air-dried sample at 105°C. This method provides a more stable sample, the air-dried sample, when tests for nitrogen, pH, cation exchange, and the like are to be made.

Methods C and D — Ash content of a peat or organic soil sample is determined by igniting the oven-dried sample from the moisture content determination in a muffle furnace at 440°C (Method C) or 750°C (Method D). The substance remaining after ignition is the ash. The ash content is expressed as a percentage of the mass of the oven-dried sample.

 

Method Data

Method 200.8
Hold Time6 months from preservation to analysis,
Preservationpreserve with HNO3 to pH <2 within two weeks of collection. Dissolve elements: acidfy the filtrate with HNO3 to pH <2 immediately after filtration. Solid samples should be kept at 4°C.
Sample Volume250mL HDPE bottle
Collection MethodGrab sampling
InstrumentationICP/MS PerkinElmer NexION 350X
Method Refernce200.8

Analyte List

AnalyteFormulaCAS Number
AluminumAl7429-90-5
AntimonySb7440-36-0
ArsenicAs7440-38-2
BariumBa7440-39-3
BerylliumBe7440-41-7
CadmiumCd7440-43-9
CalciumCa7440-70-2
ChromiumCr7440-47-3
CobaltCo7440-48-4
CopperCu7440-50-8
IronFe7439-89-6
LeadPb7439-92-1
MagnesiumMg7439-95-4
ManganeseMn7439-96-5
MolybdenumMo7439-98-7
NickelNi7440-02-0
PotassiumK7440-09-07
SeleniumSe7782-49-2
SilverAg7440-22-4
SodiumNa7440-23-5
ThalliumTl7440-28-0
TitaniumTi7440-32-6
VanadiumV7440-62-2
ZincZn7440-66-6

* The typical detection limits and analytes are displayed for this particular method. Please contact Specialty Analytical if other analytes or detection limits are required in addition to the 200.8 Analyte List.

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