BS 4427-3:1989

What is BS 4427-3- Iron content in condensed phosphates about?  

BS 4427 discusses sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. 

BS 4427-3 is the third part of the BS 4427 multi-series and discusses the determination of iron content of condensed phosphates for industrial use. It is applicable to products having an iron content of not lower than 2 mg/kg. 

Who is BS 4427-3 - Iron content in condensed phosphates for? 

BS 4427-3 on the determination of iron content of condensed phosphates for industrial use is useful for: 

• Chemical manufacturers  
• Soap and detergent manufacturers  
• Colour manufacturers  
• Quality control personnel  

Why should you use BS 4427-3 - Iron content in condensed phosphates?  

Condensed phosphates are types of phosphates that contain salts, metals, or minerals like calcium. Within this category are pyrophosphate, metaphosphate, and polyphosphate. Calcium phosphate (Ca(H2PO4)2) is a good example of a condensed phosphate.  

BS 4427-3 provides you with a spectrometric method for the determination of the iron content of condensed phosphates for industrial use (including foodstuffs). BS 4427-3 provides you with the reagents and apparatus required for the test.  

BS 4427-3  guides you with the test procedure and calculation and expression of results. BS 4427-3 helps you determine the iron content of condensed phosphates for industrial use. 

What’s changed since the last update?  

BS 4427-3:1989 supersedes BS 4427-3:1969, which is withdrawn. BS 4427-3:1989  includes some technical changes with respect to BS 4427-3:1969. These include: 

• Makes a substantial reference to BS 6337-3, possession of which is essential, and by using 1,10 — phenanthroline for the formation of the coloured complex rather than 2,2½—bipyridyl 

• Added a procedure for the preparation of a test solution suitable for the subsequent treatment of condensed phosphates and determination of iron content in accordance with the general method of BS 6337-3 which reflects current practice in technique and presentation