Hi. I am currently reviewing an ingredient which is a modified starch and am comparing their specs with CODEX standard limits in terms of heavy metal and microbial limit. For heavy metals, the specs of the modified starch complies to CODEX standard limit however I am having trouble in understanding on the microbial limit. Referring to JECFA Monographs 22, it stated that for modified starch the microbial limit of TPC is 'not more than 1000 CFU/g' means this is the CODEX standard limit right? But on the specs of the modified starch it was written maximum limit 10,000 CFU/g which is more than 1000 CFU/g right? This means that it does not comply to the CODEX standard limit am I understanding it correctly?
However, I did asked the supplier for some explanation and they only said that because in CODEX for modified starch :
n = 5, c = 2, m = 10^4 and M = 10^5
Therefore 10,000 CFU/g is acceptable. I do understand that it will become acceptable because of the three class plan but where did they refer to for the information underlined above? As I have searched through CODEX for modified starch and did not found anything on the m = 10^4 and M = 10^5. Can anyone help to explain more on this for me as I am not very familiar on microbiological part?
Thank you in advance.