ISO 7887:2011; Water quality -- Examination and determination of colour

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436, 525, 620 (ISO 7887:2011) & 455nm (EPA Method 110.2) why these specific wavelenth ? and what significat information it represent except the abs. ?

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David Oulton

Dear Ashraf,

I found sufficient detail of this standard on line to reveal the test methods used simply by inputting its full title on Google but the site makes it clear that you must pay for a full electronic or pdf print out. It would be fraudulent to pass on an un-authorized copy.

Regards and best wishes

David Oulton.

Rakesh Prasad Bhagat

So far I know, examination and determination of colour of the water in water quality assessment can be done with the help of procedure explained in American Public Health Association (APHA).