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Proficiency testing study: AQA 22-15 Metals, Nutrients and Anions in Soil

August 2022.
Sample Analytes Approx. Conc. Range (mg/kg)* Price
AUD $

S1
30 g
Soil
acid extractable
elements

As

2-50

TBA

B

10-200

Cd

0.5-40

Cr

5-250

Cu

50-750

Hg

0.2-20

Mn

50-75

Mo

1–75

Ni

1-75

Pb

25-75

Sb

1-75

Se

2-50

Tl

0.5–40

V

10-300

Zn

50-500

S2
30 g
Sandy soil
acid extractable
elements

Ag

2-40

As

2-50

Al

500-15000

B

10-200

Ba

10-200

Be

0.2-4

Bi

1-75

Co

2-40

Cu

50-500

Cs

0.2-4

La

2-40

Li

2-40

Rb

2-40

Sn

0.5-10

Th

0.5-10

U

0.5-10

Zn

50-500

S3
75 g
Agricultural soil

Ca (acid extractable)

2 500-75000

Fe (acid extractable)

2 500-75000

K (acid extractable)

750-15000

Mg (acid extractable)

750-15000

Na (acid extractable)

750-15000

P(acid extractable)

500-15000

S (acid extractable)

500-15000

Sr (acid extractable)

20-1000

Water Soluble Fluoride( F-)- 1:5 soil/water extract

0.5-40

Water Soluble Chloride (Cl-)- 1:5 soil/water extract

25-75

Water Soluble Bromide (Br-)- 1:5 soil/water extract

0.5-40

Water Soluble Iodide (I-) - 1:5 soil/water extract

0.5-40

Water Soluble Sulphate; (SO42­-) - 1:5 soil/water extract

25-750

Water Soluble Orthophosphate-P; (PO43--P) - 1:5 soil/water extract

0.5-40

pH of 1:5 soil/water suspension

TBA

EC of 1:5 soil/water extract

TBA

Kjeldahl nitrogen, total (TKN)

TBA

2M KCl Extractable (Nitrate-N)

TBA

2M KCl Extractable (Ammonium-N)

TBA

* 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.

TBA - to be advised.