Petroleum Solutions from OI Analytical

Cyanide Analysis


Fluid catalytic cracking (FCC) and hydrocracking operations enable the conversion of low-value high molecular feedstocks such as shale oil, tar sands oil, and coker gas oils into lighter, high-value petroleum products. However, the conversion process generates a large volume of wastewater known as sour water, which contains emulsified oils, phenols, sulfides, mercaptans, ammonia, and cyanide. The chemical composition of sour water complicates the measurement of cyanide species because other constituents are known matrix interferences. For almost 30 years, OI Analytical has been the leader in cyanide analysis and helped chemists around the world resolve the analytical challenges they have encountered. We support USEPA, ASTM, and ISO methods for cyanide analysis with our automated chemistry analyzers. Discover more in the method abstracts below and contact us for more information.

Available Cyanide by Automated Ligand Exchange, ASTM D6888 (FIA) 
Available Cyanide by Ligand Exchange, OIA-1677-09 (FIA)
Free Cyanide by Gas Diffusion and Amperometric Detection, ASTM D7237 (FIA)
Free Cyanide by Gas Diffusion and Photometric Detection, ISO 14403
Post-distillation Cyanide by FIA and Photometric Detection, USEPA 335.4
Total Cyanide by In-line Ultraviolet Digestion and Amperometric Detection, ASTM D7511 (SFA)
Total Cyanide by In-line Ultraviolet Digestion and Photometric Detection, ISO 14403

Sulfur Detection for Demanding Applications

You can trust OI Analytical for accurate analysis of:

  • Sulfur content in Liquefied Petroleum Gas (LPG)
  • COS in ethylene and propylene feedstock
  • Sulfur in natural gas
  • Semiconductor and industrial gas purity
  • Quality control in gas production and blending operations


Automated Titration Yields Reproducible Results

TitroLine 7000 (SMALL).PNGThere are a variety of titration procedures used in the petrochemical industry. Many of the potentiometric titrations are quite tricky; and therefore, automation is the key to reproducible results. Additionally, determining the moisture content in those samples is crucial and can be automated with a Karl Fischer titrator.

To meet these needs, OI Analytical's sister Xylem brand SI Analytics’ is excited to offer the TitroLine® 7750 as a dual potentiometric/KF solution. Built-in methods make it possible for an operator to execute all of these applications with ease on ONE system!

Read more about the determination of acidic constituents in petroleum products and lubricants by titration below:

New and Improved Technology

OI Analytical’s patented* Pulsed Flame Photometric Detector (PFPD) is the key to our success in detecting and measuring sulfur contaminants. Our Model 5383 PFPD has a linear, equimolar response enabling the unique capability to obtain simultaneous sulfur and hydrocarbon chromatograms from a single PFPD detector.

Sulfur in Stealth Mode

Sulfur compounds can be incredibly difficult to detect, causing significant problems if unnoticed. Take propylene, a co-product from steam cracking of ethylene, as an example. Carbonyl sulfide (COS) is a major contaminant in propylene feedstock and can destroy expensive catalyst beds used in polymer production and other processes if not removed.

Read more in Analysis of Impurities in Ethylene/Ethane and Propylene/Propane Streams Using a Pulsed-Flame Photometric Detector (PFPD).

Hassle-free Refractometry Method Provides More Reliable Analysis


The measurement of refractive index is commonplace within the petrochemical industry and its determination is cited in many technical documents and standard test methods such as ASTM D2140 for calculating the carbon-type composition of insulating oils.

Refractometer manufacturer, and Xylem Analytics sister brand, Bellingham + Stanley has established a method within their latest RFM900-T Series instruments that (once all parameters are known) automatically calculates and displays the relevant information on the instrument display and/or printed report. This eliminates the frustration of manual
interpretation and provides far more reliable results,
especially if different operators are involved in the process.


Petroleum Analysis

At OI Analytical, we understand the ability to detect and measure sulfur contaminants in gases is critical for efficient operation and product quality control. That’s why we’ve been been working with industry experts since the beginning to provide practical laboratory solutions for petroleum analysis. The result: instrumentation built specifically for superior selectivity and sensitivity of sulfur compounds in an array of petroleum products.