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Actlabs
Geochemistry / Assay


Sample Preparation

The largest source of error in any sampling program is the sample collection stage. To obtain meaningful analytical results, it is imperative that this stage, as well as sample preparation be done properly. Actlabs can advise on sampling protocol for your field program if requested. 

 

Once the samples arrive in the laboratory, Actlabs will ensure that they are prepared appropriately. As a routine practice with rock and core, the entire sample is crushed to a nominal minus 10 mesh (1.7 mm), mechanically split (riffle) to obtain a representative sample and then pulverized to at least 95% minus 150 mesh (106 microns).  All of our steel mills are mild steel and do not induce Cr or Ni contamination.


As a routine practice, we will automatically use cleaner sand between each sample at no cost to the customer. Quality of crushing and pulverization is routinely checked as part of our quality assurance program. Samples submitted in an unorganized fashion will be subject to a sorting surcharge and may substantially slow turnaround time.  Providing an accurate detailed sample list by e-mail will also aid in improving turnaround time and can be used for Quality Control purposes. 

 

See pages 5 and 6 of the pricelist for preparation and additional fees.

Our Sample Preparation Pricing is all-inclusive. This includes sorting, drying, labeling, new reject bags, using cleaner sand between each sample and crushing samples up to 7Kg (for RX1). 

 

Rock, Core, and Drill Cuttings

Package

Description

RX1

Crush (<7kg) up to 90% passing 2mm, split (250g) and pulverize (mild steel) to 95% passing 105u

RX1+500

500 grams pulverized

RX1+800

800 grams pulverized

RX1+1000

1000 grams pulverized

RX1-SD

Crush (<7 kg) up to 90 % passing 2 mm, rotary split (250 g) and pulverized (mild steel) to 95% passing 105µ

RX3

Oversize charge per kilogram for crushing

RX4

Pulverization only (mild steel) (coarse pulp or crushed rock) (<800g)

RX5

Pulverize Ceramic (100g)

RX6

Hand pulverize small samples (agate mortar & pestle) (< 5 g)

RX7

Crush and Split (<5Kg)

RX8

Sample Prep only surcharge, no analyses

RX9

Compositing (per composite) dry weight

RX10

Weight (Kg) as received

RX11

Checking Quality of pulps or rejects prepared by other labs and issuing reports

RX12

Ball Mill preparation

RX13

Rod Mill preparation

RX14

Core cutting

RX15

Special Preparation/Hour

RX16

Specific Gravity on Core

RX16-W

Specific Gravity (WAX) on friable samples

RX17

Specific Gravity on pulps

RX-17-GP

Specific Gravity on pulps by gas pyncometer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: Larger sample sizes than listed above can be pulverized at additional costs.

 

 

Pulverization Contaminants Added

Mill Type

Contaminant Added

Mild Steel
(best choice)

Fe (up to 0.2%)

Hardened Steel

Fe (up to 0.2%). Cr (up to 200ppm), trace Ni, Si, Mn, and C

Ceramic

Al (up to 0.2%), Ba, Trace REE

Tungsten Carbide

W (up to 0.1%), Co, C, Ta, Nb, Ti

Agate

Si (up to 0.3%), Al, Na, Fe, K, Ca, Mg, Pb

 

Note: Amount added depends on hardness of material and particle size required


 

 

Soils, Stream and Lake Bottom Sediments, and Heavy Minerals

Package

Description

S1

S1 DIS

S1-230

S1-230 DIS

Drying (60°C) and sieving (-80mesh), save all portions

Drying (60°C) and sieving (-80mesh), discard oversize

Drying (60°C) and sieving (-230mesh), save oversize

Drying (60°C) and sieving (-230mesh), discard oversize

S2

S3

S4

S5

S6

S7mi

Lake Bottom Sediment preparation crush & sieve (-80mesh)

Alternate size fractions and bracket sieving, add

Selective Extractions or SGH drying (40oC) & sieving (-60mesh)

Wet or damp samples submitted in plastic bags, add

Separating -2 micron material

Methyelene iodide heavy mineral separation
Specific gravity can be customized (100 grams)

S7w

Sodium Poly Tungstate heavy mineral separation

Specific gravity can be customized (100 grams)

S8

Sieve analysis (4 sizes)

S9

Particle size analysis (laser)


Biogeochemical Sample

Code

Description

B1

Drying and Blending Humus

B2

Drying and Macerating vegetation

B3

Dry ashing

B4

Washing vegetation

B5

Samples submitted in plastic bags, add


 
Special Digestion Procedures

MDI

Microwave Digestion – Closed Vessel


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