AOAC Methods Review (Codex STAN 234)

Steve Holroyd

No Question 1 Method #

Possible Answers

960.40

2 Review Status 3 Provision listed in CXS 234 4 Principle listed in CXS 234 5 Type listed in CXS 234

Copper

Colorimetric

II

6 Choose Commodity listed in CXS 234 7 Corresponding Codex Commodity standard 7a Does the commodity standard give ranges for the  provision? 7b If yes, include range from standard 8 Does the method document include the commodity in  the field of application? N 8a Please provide information on the commodity in the  field of application N

Food

Unsure given broad range

Applicable to all foods, noted that high fat foods  require additional procedure,  as written does  not contain precision data or specify  applicability to milk fat products.

9 Is the method information accurate? Y 9a If no, please describe the information that should be  corrected. 10 Is the method fit for purpose to measure the provision  as listed in the commodity standard ? Y 10a Please provide information 11 Is the method fit for purpose according to technical  evaluation ? Y 11a Please provide information on technical evaluation Sample digested with mix of acids and copper  isolated and bound with chelating agent to  afford colured complex that is asssed  photometerically at 400nm via calibration  standards 12 Is the method listed alongside any other methods in  CXS 234?  N 12a If yes, please list methods as listed in CXS 234 12b If yes, please provide indication of comparability of the  AOAC method referenced with co‐listed methods, if  possible We note ISO 5738|IDF 76 are more suitable for  dairy products and in common usage, for all  foods more modern methods have superseded  this technique ( AOAC 984.27) 

13 Is further review of this method needed?

Y

13a If yes, skip to Q14 13b1 If no, please provide final recommendation for CXS  234, considering only the method under review 13b2 If no, please provide final recommendation for CXS  234, if possible, considering all methods listed for this  commodity and provision 14 Is this method in use in your laboratory or by other  laboratories of which you are aware? N

Additional review needed