CORE, ROCKS, DRILL CUTTINGS
Actlabs Sample Preparation pricing is all-inclusive including: sorting, drying, labeling, new reject bags, using cleaner sand between each sample and crushing samples up to 7 kg (for RX1 and RX1-SD)
As a routine practice for rock and core, the entire sample is crushed to a nominal -2 mm, mechanically split to obtain a representative sub-sample and then pulverized to at least 95% -105 microns (µm). All of our steel mills are mild steel and do not introduce Cr or Ni contamination. Quality of crushing and pulverization is routinely checked as part of our quality assurance program.
|Code RX1||Crush (< 7 kg) up to 80% passing 2 mm, riffle split(250 g) and pulverize (mild steel) to 95% passing 105 µm included cleaner sand|
|Code RX1-ORE||Crush up to 90% passing 2 mm|
|Code RX1+500||500 grams pulverized|
|Code RX1+800||800 grams pulverized|
|Code RX1+1000||1000 grams pulverized|
|Code RX1-SD||Crush (< 7 kg) up to 80% passing 2 mm, rotary split(250 g) and pulverized (mild steel) to 95% passing 105µm|
|Code RX1-SD-ORE||Crush up to 90% passing 2 mm|
|Code RX3||Oversize charge per kilogram for crushing|
|Code RX4||Pulverization only (mild steel)(coarse pulp or crushed rock) (< 800 g)|
|Code RX5||Pulverize ceramic (100 g)|
|Code RX6||Hand pulverize small samples(agate mortar & pestle) (<5g)|
|Code RX7||Crush and split (< 5 kg )|
|Code RX8||Sample prep only surcharge, no analyses|
|Code RX9||Compositing (per composite) dry weight|
|Code RX10||Weight (kg) as received|
|Code RX11||Checking quality of pulps or rejects prepared by other labs and issuing report|
|Code RX12||Ball Mill preparation|
|Code RX13||Rod Mill preparation|
|Code RX14||Core cutting|
|Code RX15||Special Preparation/Hour|
|Code RX16||Specific Gravity on Core|
|Code RX16-W||Specific Gravity (WAX) on friable samples|
|Code RX17||Specific Gravity on the pulp|
|Code RX17-GP||Specific Gravity on the pulp by gas pycnometer|
This method consists of determining the mass of a specimen in air and subsequently immersing it in water. The apparent mass of a sample upon immersion in water is determined and its specific gravity calculated. This test method is based on ASTM D792 Standard Test Method for Density and Specific Gravity (Relative Density).
Sample size is 20-50 gram and any loose pieces should be removed before weighing and immersing. If material is lost during weighing the test is restarted. Two pieces per sample are measured to show variance and to identify samples to be rechecked. Samples are to be rechecked if the variance between the Specific Gravities for the 2 samples is greater or equal to 0.075. Temperature of water and sample must be at 23 °C +/- 2 °C.
The Calculation of specific gravity is as follows:
Sp gr 23/23 °C = a/(a+w-b)
a = apparent mass of specimen, without wire or sinker in air
b = apparent mass of specimen (and of sinker, if used) completely immersed in water.
w = apparent mass of totally immersed sinker if used and wire.
Specific gravity is measured using the relative volumes of solids to water and air in a given volume. This can be used on solids that pass the 4.75 mm (No. 4) sieve. The measurement is done using a Pycnometer (calibrated volumetric flask) following ASTM D854.
This test cannot be used for soil solids which can be altered by this method, contaminated with a substance that prohibits the use of this method, or for highly organic soil solids, such as fibrous matter, which floats in water.
Precision and bias are determined to judge the acceptability of the test results. QC is 12 % for each batch of 50, 1 blank, 1 Silica flour control, 4 sample duplicates.