AOAC Methods Review (Codex STAN 234)

1. In your experience using the method, does the method perform according to the method"s applicability as written? 2. In your experience with the method, are there any safety concerns identified while using or regarding use of the method? 3. Do you have any information that supports regarding the reproducibility of this method as written? If so, please specify and submit information. 4. Based on your experience with the method, are there any recommended changes to the AOAC First Action method as written?

Yes.

It has to be considered that hexavalent chromium is a carcinogenic agent. This information is also described in the method ISO 1738 / IDF 12 (listed in CXS 234).

No.

Some possible modifications could concern: 1) the definition of reagents with relation to the desired analytical grade. With relation to distilled or demineralized water, it should be free from chlorides; 2) the apparatus is not described; 3) repeatability and reproducibility are not mentioned ; the same thing can be affirmed when speaking of the minimum number of determinations; 4) blank test is needed; 5) finally, the calculation of results should take into account the difference between two determinations: Ml of used 0.1 M AgNO3 for the sample (Vs), and Ml of blank test (Vb).

Would you like to provide comment(s) or feedback on additional methods? This form contains feedback for three (3) methods. You may now provide feedback on two (2) additional methods.

No, thank you!

Name

Salvatore Parisi

E-mail Address

drparisi@inwind.it

Organization

Al Balqa'a Applied University

Address

Street Address: Via Roccazzo Street Address Line 2: 25 City: Palermo State/Province: Sicily / PA Postal /Zip Code: 90100 Country: Italy