Cyanide Analysis

Analysis of Clean Water Act

The MUR of 2012 Clean Water act allows the replacement of Manual Cyanide Distillation for WAD and Available Cyanide. This action makes available at 40 CFR part 136 an additional test procedure for measurement of available cyanide. Currently approved methods for measurement of available cyanide are based on sample chlorination. Method OIA–1677 uses a flow [...]

2017-05-04T13:20:27-07:00

Run Gas Diffusion on Autoanalyzers Effortlessly

Sample line tubing and connections need more attention with Gas Diffusion Chemistries The gas diffusion methods for analyzing Ammonia, Total Keldahl Nitrogen and the various species of Cyanide have produced a few specific problems not normally seen on classic colorimetric chemistries run on an autoanalyzer. Due to the precise nature of the gas passing across [...]

2019-04-08T10:34:45-07:00

Gas Diffusion Methods – The Benefits Are Stacking Up

The U.S. EPA and ASTM cyanide analysis methods based upon gas diffusion amperometry do not require a preliminary acid distillation step and are now approved as amendments to 40 CFR 136 Clean Water Act Methods on their website as published in the 2012 Method Update Rules (MUR) in the Federal Register. These methods were specifically [...]

2017-09-27T12:08:20-07:00

Testing for Total Cyanide Using Gas Diffusion

ASTM D7511-09 Standard Test Method for Total Cyanide by Segmented Flow Injection Analysis, In-Line Ultraviolet Digestion and Amperometric Detection This is a new standard test method that was developed by ASTM Committee D19 on Water to determine the concentration of total cyanide in drinking and surface waters, domestic wastewater, and industrial wastewater. Cyanide ion (CN-), hydrogen [...]

2017-09-27T12:08:20-07:00

How to Test for Free Cyanide Utilizing Gas Diffusion

ASTM D7237 Standard Test Method for Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection This is a new standard test method that was developed by ASTM Committee D19 to determine the concentration of free cyanide in an aqueous wastewater or effluents. The method detects free cyanide (HCN and CN-) and a [...]

2017-09-27T12:08:20-07:00

Utilizing Flow Injection Analysis and Gas Diffusion

ASTM D6888-09 Standard Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection ASTM Committee D19 on Water has recently revised this standard. This method is used to determine the concentration of available inorganic cyanide in an aqueous wastewater or effluent. The method detects free [...]

2017-09-27T12:08:21-07:00

Approved Cyanide Determination Methods

Docket ID No. OW-2003-0070 Comments Related to the Proposed Cyanide Determination Methods Federal Register / Vol. 69, No. 66 / April 6, 2004 / Proposed Rules, pp. 18166 – 18226 Prepared by: Emil Milosavljevic, Ph.D. and Ljiljana Solujic, Ph.D. Distillation-based methods for determination of operationally defined cyanide have very limited application because of the serious interferences from the species likely [...]

2017-09-27T12:08:21-07:00

A Short History of the Gas Diffusion Module

Gas diffusion modules are used in autoanalyzers whether segmented flow analysis (SFA), sometimes referred to as continuous flow analysis (CFA), or flow injection analysis (FIA). The purpose of the gas diffusion module is to function as an in-line cleanup eliminating particulates, potential ionic interferences and chemical complexes. The target analyte permeates through the membrane into a [...]

2017-09-27T12:08:22-07:00

Standard Curves and Check Standards Can Make All the Difference

Standard curves and check standards can make all the difference in the successful operation of autoanalyzers and discrete anlayzers. The importance of validating results for accuracy becomes a very important rock of consistency when operating an autoanalyzer or discrete analyzer in the hazardous field laboratory analysis environment. We are taught how to make standards and validate them with [...]

2017-09-27T12:08:22-07:00
Go to Top