BS ISO 7760:2001

This standard BS ISO 7760:2001 Photography. Processing waste. Determination of hydroquinone is classified in these ICS categories:

• 13.030.30 Special wastes
• 37.040.30 Photographic chemicals

This International Standard specifies a spectrophotometric method for the determination of hydroquinone in photographic processing waste.

This method can be applied to samples containing hydroquinone in the concentration range of 200 μg/l to 4 000 μg/l; aminophenols and phenylenediamines should also be determined by this method. However, sulfonated hydroquinones or products from the further oxidation of benzoquinone will not be determined.