ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Distribution of aflatoxin in pistachios. 7. Sequential sampling.

SCHATZKI, T.F.

Journal of Agricultural and Food Chemistry 48: 4365-4368.

2000

บทคัดย่อ

Sequential sampling for aflatoxin testing in pistachios was evaluated using the aflatoxin distribution and Monte Carlo results previously obtained. The sequential protocol was modelled on the current EU test protocol by applying a three-step sampling, using 10, 20 and 30 kg sample averages. An acceptance level of 15 mg/kg of total aflatoxin, under consideration for USA standards, was applied. Optimisation led to indifference regions of 2-30 mg/kg for the first two steps. The resulting operational characteristic curve approximates that for a single 50 kg sample. The sequential protocol was applied to the results for a set of 1293 lots of the 1998 crop year, each tested with a single 10 kg sample. Ninety-five percent of the lots would have been accepted on the basis of the single test and 1.5% would have been rejected, whereas 3.5% of the lots would have required retesting.