School of Earth Sciences
Stanford University 

 


Water and Solution Analyses

Test Description

Instrument

Cost per hr($)

Samples per hr

Sample Size

Notes

Nitrate-N & Nitrite-N (cadmium reduction)

DA

20

30

1 mL

a

Nitrite-N

DA

20

30-45

1 mL

a

Ammonium-N

DA

20

30-45

1 mL

a

Orthophosphate-P

DA

20

30-45

1 mL

a

Total Carbon (combustion)

TOC

8

4

5 mL

 

Total Organic Carbon (combustion)

TOC

8

4

5 mL

 

Total Inorganic Carbon

TOC

8

4

5 mL

 

Elemental Analysis by ICP

(Al, As, Ba, Bi, Cd, Ca, Cr, Co, Cu, Eu, Gd, Fe, La, Pb, Li, Mg, Mn, Hg, Mo, Nd, Ni, P, K, Pr, Sm, Se, Si, Ag, Na, S, Sr, U, Y, Zn, etc.)

ICP

30

10-20

8 mL

 

Ion Analysis by IC

AS11-HC Column:

Organic acids and inorganic  anions - F-, Cl-, NO2-,  SO42-, Br-, NO3-, PO43-

AS6 Column:

Organic acids

IC

10

Variable

0.5 mL

 

Total Mercury

MA

20

15

35 mL

b

  1. Samples must be kept at 4 degree C (35F)
  2. Samples must be filtered with a 0.45mm or smaller membrane filters and preserved with minimum 0.5% Bromine Monochloride. Filtered samples need to be stored in GLASS vials with Teflon lined lids (I-Chem brand).

* Prices subject to change without notice

 

 

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