BS 6068-2.18:1986

What is BS 6068-2.18 — Physical, chemical, and biochemical methods about? 

BS 6068-2.18 specifies three methods for the determination of easily liberatable cyanide (see clause 2) in water.

The methods described in BS 6068-2.18 apply to water containing less than 100 mg of cyanide per liter, but higher concentrations may be determined by suitable dilution of the sample.

The methods described in BS 6068-2.18 and corresponding ranges of cyanide contents for which they are suitable are as follows:

• Photometric method with pyridine/barbituric acid: applicable when the absorption solution contains 0,002 to 0,025 mg of cyanide, corresponding to 0,02 to 0,25 mg/l in a 100 ml aliquot portion of the undiluted sample
• Titrimetric method using the Tyndall effect: applicable when the absorption solution contains > 0,005 mg of cyanide, corresponding to > 0,05 mg/l in a 100 ml aliquot portion of the undiluted sample
• Titrimetric method using an indicator, applicable when the absorption solution contains > 0,05 mg of cyanide, corresponding to > 0,5 mg/l in a 100 ml aliquot portion of the undiluted sample

Who is BS 6068-2.18 — Physical, chemical, and biochemical methods for? 

BS 6068-2.18 on the Physical, chemical, and biochemical methods are useful for: 

• Wastewater collecting systems 
• Wastewater treatment plants 
• Plants treating industrial wastewater 
• Water supply treatment plants  

Why should you use BS 6068-2.18— Physical, chemical, and biochemical methods? 

Cyanides may be present in water as hydrocyanic acid (prussic acid), cyanide ions, and complex cyanides. They may be determined as total cyanide or as easily liberate cyanide, if cyanide compounds are chlorinated, cyanogen chloride (ClCN) is produced, and this compound has to be determined separately.

BS 6068-2.18 provides methods for characterizing water quality based on physical, chemical, and biochemical measures and methods for determining the easily liberatable cyanide present in raw water.

BS 6068-2.18 provides you with apparatus, sampling, transport, storage, and preparation of test pieces, preparation of reagents and apparatus, pre-treatment of test pieces, test procedure, and much more.

The test methods and procedures provided by BS 6068-2.18 assist you in the determination of easily liberatable cyanide content in water and ensure reducing the risk of severe health issues.

With obedience and compliance to BS 6068-2.18, you can enhance the efficacy of the water and manufacture a standardized product.