APPLICATION NOTE

Contaminated Soil – EnviroMAT – SS-1

SUMMARY

The application note summarizes the digestion of SS-1, a contaminated soil matrix reference material using ColdBlock™ Digestion Pro Series Technology.

Instrument:ColdBlock CBM (with quartz test tubes), chiller, ICP-MS & ICP-OES
Published:July 2024
Digestion Time:30 Minutes
Acid Used:HNO3 & HCI
Average ColdBlock Recovery vs. CRM:
  • 97% Boron
  • 102% Mercury
  • 102% Molybdenum

METHODOLOGY

  1. Chiller temperature was set to -5°C
  2. 0.5g of each sample was weighed and placed into a quartz ColdBlock™ Digestion vessel
  3. 10 mL of HNO3 was added
  4. Sample was digested at 70% power for 20 minutes
  5. 10mL of HCl was added and samples were digested again at 70% for 10 minutes
  6. Samples were cooled and bulked to 40mL using 2% HNO3v/v

DISCUSSION

  • Samples were filtered prior to analysis by ICP-MS & OES
  • EnviroMAT SS-1 is a type B naturally contaminated soil. It is not spiked or fortified
SS-1 after digestion and bulk up to 40mL

Results

Table 1 – Results of HNO3 & HCl digestion – SS-1 Contaminated Soil

Method:

0.5g

10mL HNO3 70% power for 20 minutes, then add 10mL HCl and digest again at 70% power for 10 minutes

Element

Consensus Value (ppm)

+/-

Sample A

Sample B

Sample C

Average (ppm)

Stdev

RSD

Recovery

Ag

0.88

0.88

0.95

0.91

0.89

0.9

0.02

2.7%

104%

Al

12163

410

12779

12623

11859

12420

402

3.2%

102%

As

20.7

1.0

22.06

21.79

21.52

21.79

0.22

1.0%

105%

B

26.9

8.4

29.2

25.1

23.7

26

2.3

9.0%

97%

Ba

464

16

476

473

462

471

5.9

1.3%

101%

Be

0.48

0.05

0.46

0.47

0.5

0.477

0.017

3.6%

99%

Ca

50265

1213

49461

49546

48744

49250

359.7

0.7%

98%

Cd

3.2

0.2

3.2

3.3

3.2

3.2

0.05

1.5%

101%

Co

12.9

0.4

13.0

12.3

13.2

12.8

0.4

3.1%

99%

Cr

103

5

108

106

106

106.7

1.1

1.0%

104%

Cu

403

10

406

425

398

409

11.3

2.8%

102%

Fe

72000

2273

71986

73914

70996

72299

1212

1.7%

100%

Hg

0.41

0.02

0.40

0.45

0.41

0.42

0.02

5.1%

102%

K

2232

150

2288

2193

2199

2227

43.4

2.0%

100%

Li

14.3

1.4

14.2

14.3

13.6

14.0

0.3

2.2%

98%

Mg

9690

230

9867

10088

9683

9879

166

1.7%

102%

Mn

737

19

758

747

734

746

9.8

1.3%

101%

Mo

6.8

0.3

6.7

6.7

7.4

6.92

0.3

4.5%

102%

Na

650

64

739

742

736

739

2.4

0.3%

114%

Ni

59.2

1.3

62.6

63.6

63.7

63.3

0.5

0.8%

107%

P

1552

34

1621

1614

1643

1626

12.4

0.8%

105%

Pb

764

15

780

762

775

772.5

7.8

1.0%

101%

S

1916

140

1927

1914

1913

1918

6.4

0.3%

100%

Sb

5.5

1.1

5.60

5.2

6.0

5.6

0.3

5.8%

102%

Se

0.78

0.14

0.82

0.86

0.78

0.82

0.03

4.0%

105%

Sn

340

17

353.00

366

367

362.00

6.4

1.8%

106%

Sr

114

1

114

112

114

113.4

0.7

0.6%

99%

Ti

530

57

533

530

531

531.33

1.2

0.2%

100%

U

0.78

0.03

0.79

0.77

0.75

0.77

0.02

2.1%

99%

V

27.2

1.4

28.97

28.93

27.97

28.62

0.5

1.6%

105%

Zn

1114

37

1062

1057

1124

1081

30.4

2.8%

97%

Click here to download the Application Note in PDF format.

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