Conti Testing Labs

Coal & Coke Testing

Conti Testing specializes in coal and coke testing and offers comprehensive analysis, sampling, consulting and inspection services.  All of the testing is performed at our facility in Bethel Park, Pennsylvania, and our team of experts ensure that the whole process, from sampling through data reporting, is done timely and accurately.  Our equipment is checked and maintained regularly and test results are verified through certified standards, proficiency testing, and interlaboratory comparative testing.

Proximate & Ultimate Analysis of Coal

Some of the most common coal testing performed is Proximate and Ultimate analysis. Proximate analysis results will indicate the Heating value of the coal, whereas the Ultimate analysis, which is more comprehensive, is dependent on analysis of various elements present in the coal sample.


There are some variations of the Proximate Analysis that include slightly different analyses. These variations are known as Short Prox and Full Prox. The specific analyses for them are shown in the Proximate Analysis box.


Proximate Analysis

Short Prox: M, A, S, BTU

Full Prox: M, A, S, VM, BTU, FC

Ultimate Analysis
Physical Analysis

Physical Coal & Coke Analysis

The Physical Analysis tests determine the physical characteristics of the coal or coke, including: strength, size, washability, expansion and contraction.

The indexes, Coke Reactivity Index (CRI) and Coke Strength after Reaction (CSR), are arguably the most important parameters when it comes to assessing the quality of metallurgical coke.

We are one of the few labs that can perform CRI/CSR testing.

*Petrography is used to determine the Rank and Type of coal and is performed by third-party analysis.

Chemical Analysis

In addition to Proximate and Ultimate Analysis testing, there are many tests for determining the chemical properties of coal. These are some of the more common tests we perform.

Sulfur Forms include: Total, Organic, Pyritic and Sulfate.

Elements analyzed during a typical ICP Trace Elements scan:
Al, Sb, As, Ba, Be, B, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Mo, Ni, K, Se, Ag, Na, Sr, Sn, Ti, V, Zn

Elements analyzed during a typical ICP Major & Minor Elements scan:
Al, Ba, Ca, Fe, Mg, Mn, P, K, Si, Na, Sr, S, Ti 

Reported as Elemental Oxides

Chemical Analysis