What is the minimum sample size required for low level metals analyses?

Modified on: Fri, 3 May, 2019 at 1:07 PM


For metals, typical minimum sample requirements are 20 mL for waters.  Larger volumes are recommended to allow for Quality Control samples and repeats. 



Sample Collection – Ultra Trace Metals and Mercury

Sampling

Element

Groundwater

Surface

Water

Drinking Water

Sample Container

50  mL HDPE

50 mL HDPE

50 mL HDPE

Field Filtered

Yes

No

No

Preservative

HNO3

(to pH <2)

HNO3

(to pH <2)

HNO3

(to pH <2)

Min. Sample Size

20mL

20 mL

20 mL

Recommended Sample Size

50 mL

50 mL

50 mL

Hold Time

 days

60 days

60 days

Sample Container

50 mL HDPE

50 mL HDPE

50 mL HDPE

Dissolved Metals (filtered)

Yes

No

No

Preservative

HCl

(to pH <2)

HCl

(to pH <2)

HCl

(to pH <2)

Min. Sample Size

50mL

50 mL

50 mL

Recommended Sample Size

100 ml

100 ml

100 ml

Hold Time

28 days

28 days

28 days


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