TOC can be measured in the grab sample at a concentration as low as 5 ppb, using the same technique employed for the on-line analysis ( see on-line method description ).
12.
In lakes grab samples are relatively simple to take using depth samplers which can be lowered to a pre-determined depth and then closed trapping a fixed volume of water from the required depth.
13.
Grab samples from its summit contain the highest gold concentrations yet reported from the modern seafloor ( max . 230 g / t Au, avg . 26 g / t, n = 40 ).
14.
Sampling of coal is an important part of the process control in the CPP . A grab sample is a one-off sample of the coal at a point in the process stream, and tends not to be very representative.
15.
Grab sample analysis are typically performed for the following parameters : metals, anions, ammonium, silica ( both dissolved and total ), particles by SEM ( scanning electron microscope ), TOC ( total organic compounds ) and specific organic compounds.
16.
When calibrated using traditional grab samples or cores coupled with a few SP images, resolution allows identification of some infauna including the tubicolous sabellid polychaetes, a bisected nereid, and the mound produced by a sea cucumber seen in Figure 2.
17.
Other past work in the vicinity of the property includes two diamond drill holes targeted at the Plough Lead and grab sampling of the Cameron, McFarlane Leads and a quartz vein at Barachois point by Durham Resources . ( Abolins, 1985 ).
18.
In order to enable grab samples or rivers to be treated as representative, repeat transverse and longitudinal transect surveys taken at different times of day and times of year are required to establish that the grab-sample location is as representative as is reasonably possible.
19.
Grab samples from the submarine Conical Seamount, located about 8 km south of Lihir Island, contain high gold concentrations of up to 230 g / t Au ( avg . 26 g / t, n = 40 ) that are hosted by high-potassic trachybasalts.
20.
The researcher must compromise between data collection grain, dimensions of the actual sampling unit ( typically 0.1 m 2 grab or similar ), and lag-distance between sample units over which results will be interpolated ( often tens to hundreds of metres for grab samples ).
