Pin-shaped sample

Sample Form Solid/ powder 1 Conducting pin (shape important) 2 Conducting pins (can be irregular)... 

Sample 1012 is from a small pin-shaped metal fragment that was found in connection with the Late Bronze Age crucibles in area B-l. 

The maturity of GD-MS as a technique capable of routinely providing complete chemical analyses at the ultratrace level for insulating solid materials has clearly been demonstrated by quantification of a full range of elements (from Li to U) in coal and coal fly ash [643]. The samples were mixed with high-purity Ag powder as the binder and pressed into a pin shaped pellet by means of a polypropylene mold. Critical steps in the determination process were the inhomogeneous distribution of elements within and among the fly ash particles and the purity of the binder. The presence of highly volatile compounds hindered the application to bituminous coal. 

A GD-MS method has been developed for the analysis of microliter volumes of aqueous solutions which permitted the long-term acquisition of data [656]. Samples were either adsorbed on pin-shaped electrodes prepared by pressing high-... 

Figure 45(d) shows the determination of the tensile strength of model agglomerates by means of the wall friction method.For this test a cylindrical pellet—sometimes with a central pin—is produced in a press. After removing the specimen from the press, it is stressed directly in the die shell. The tensile force is transmitted by adhesion between the end surfaces and the pistons as well as on the circumference and the die walls. Again, the tensile strength is defined by the quotient rupture force P divided by the cross section of the cylindrical or ring-shaped sample. 

The influence of other, minor variables can also be adjusted in order to improve performance. Thus, in addition to the typical parameters [viz. rf power, power density, plasma gas flow-rate and pressure, ion sampling distance, anode orifice diameter, and sample size, thickness and shape (pin-like or planar)], the efficiency of GD sampling as regards analytical stability, reproducibility, and quantitation and detection limits, also depends on cell configuration — which has strong effects on radial diffusion processes. 

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