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7 - Enhanced Enzyme Selective Extraction

Enzyme Selective Extraction (ESE) is one of the most discriminating of the selective analytical extractions in use today. This selective extraction targets amorphous mixed oxide coatings. By selectively removing the amorphous manganese dioxide from these coatings, the mixed oxide coatings collapse, releasing trapped trace elements. At this time, the greatest depth of penetration of ESE for a mineral deposit is greater than 800 meters.

 

The Enhanced ESE package offers lower detection limits than the standard package.

 

A 0.75 g sample of -60 mesh B soil horizon material is leached in enzyme matrix containing a glucose oxidaze solution at 30 o C for 1 hour. The enzyme reacts with amorphous MnO2 dissolving it. The metals are complexed with the gluconic acid present. 

 

The solutions are analyzed on a Perkin Elmer ELAN 6000, 6100 or 9000 ICP/MS.  For each tray of 54 samples there is one blank, three duplicates, 4 standards and 46 samples. 

 

 

Element

Detection Limit

Element

Detection Limit

Element

Detection Limit

Element

Detection Limit

Ag

0.1

Er

0.01

Mo

0.1

Sn

0.2

Al

0.5 ppm

Eu

0.01

Na

5 ppm

Sr

0.1

As

0.1

Fe

1 ppm

Nb

0.1

Ta

0.02

Au

0.005

Ga

0.3

Nd

0.01

Tb

0.01

Ba

0.5

Gd

0.01

Ni

1

Te

0.5

Be

0.1

Ge

0.05

Os

0.5

Th

0.01

Bi

0.5

Hf

0.01

Pb

0.1

Ti*

10

Br

1

Hg*

0.1

Pd

0.5

Tl

0.005

Ca

5 ppm

Ho

0.01

Pr

0.01

Tm

0.01

Cd

0.1

I

1

Pt

0.5

U

0.01

Ce

0.01

In

0.01

Rb

0.1

V

0.1

Cl*

1000

K

5 ppm

Re

0.005

W

0.1

Co

0.2

La

0.01

Ru

0.5

Y

0.05

Cr

3

Li*

0.5

Sb

0.01

Yb

0.01

Cs

0.01

Lu

0.01

Sc*

10

Zn

5

Cu

1

Mg

2 ppm

Se

1

Zr

0.1

Dy

0.01

 

Mn

0.4

 

Sm

0.01

 

 

 

 

Note:    
 *Values are Semi-Quantitative

 

 

Code 7

Add-Ons

pH of leach solution

Conductivity of leach solution

pH + Conductivity

 


Activation Laboratories Ltd. | 41 Bittern Street, Ancaster, Ontario, L9G 4V5, Canada | TF: +1.888.228.5227
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