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Proficiency test AQA 20-02 Metals, Nutrients and Exchangeable Bases in Soil

Main content area

February 2020

Sample

Analytes

Approximate Conc. Range (mg/kg)**

Price*
AUD $

S1

30 g

dried soil
acid extractable
elements

As

1-50

FOR NATIONAL

PARTICIPANTS

 

Any single

sample

$500

 

Any two
samples

$690

 

All three
samples

$890

 

FOR INTERNATIONAL

PARTICIPANTS

 

Any single

sample

$680

 

 

Any two
 samples

$920

 

 

All three
 samples

$1030

 

 

 

 

Be

1-50

Cd

0.5-25

Cr

5-500

Cu

2-100

Hg

0.2-5

Mn

50-1000

Mo

25-500

Ni

5-500

Pb

2-200

Sb

25-750

Se

2-50

Sn

10-200

V

20-500

Zn

10-300

S2

30 g

moist soil
acid extractable
elements

Ag

5-150

As

1-50

Al

500-15000

B

5-150

Ba

5-150

Bi

0.5-10

Co

5-150

Cs

1-20

La

5-150

Li

5-150

Mn

50-1000

Rb

5-50

Se

2-50

Sn

10-250

Tl

0.5-10

U

5-150 

Zn

50-1000

Moisture Content (%)

5-30%

S3

75 g
 agricultural soil
 

Ba, Ca, Fe, K, Mg, Na, P, S, Sr
(acid extractable)

NA

P (total)

NA

Exchangeable bases (Ca2+, Mg2+, Na+, K+) -
1M NH4Cl extract1

>0.05

Calcium chloride-extractable B2

NA

Colwell K, Colwell P

NA

P buffer index (with Colwell P)-PBI+ColP3

NA

Total Carbon, Total Organic Carbon

NA

Total Nitrogen

NA

pH of 1:5 soil/0.01M CaCl2, EC

NA

Accredited for compliance with ISO/IEC 17043

*Shipping costs are included; GST not included.

** As these samples are real samples, the values given are indicative, based on the range of materials used in previous rounds. These ranges will be readjusted in the dispatch letter. 1 Method 15A1, 2Method 12C, 3Method 9I2 as defined by Rayment, G.E. and David, J. L in “Soil Chemical Methods-Australia”.  Results to be reported in units of (cmol(+)/kg)

NA - not available

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Last updated: 27 February 2020

Content ID: 66459