Study on cadmium contents in exported squid, cuttlefish and octopus
1991
Tasanee Thitakamol
In studying cadmium contents in exported squid, cuttlefish and octopus, samples of four different sizes for each kind of both frozen and raw cephalopods were taken from a cold storage located in Samutprakarn Province during April to June 1989. Each sample was divided into four parts i.e. total body, body, head and gut (for raw cephalopods only) to be analysed for cadmium contents. In sample preparation dry ashing was used and the resulting ash was dissolved in 20 % (v/v) HNO3. Extraction with APDC-chloroform was performed when cadmium was found somewhat high. Atomic absorption spectrometry was used for cadmium measurement. The levels of cadmium in squid, cuttlefish and octopus were in the ranges 0.60-0.51, 0.06-2.51 and 0.06-8.22 mg/kg respectively for frozen samples: 0.06-8.68, 0.06-9.08 and 0.06-10.56 mg/kg respectively for raw samples. A trend of higher contents of cadmium was found in raw cephalopods. Cadmium was likely to accumulate in guts of cephalopods more than in other parts studied. The cadmium contents in raw squid, cuttlefish and octopus were 1.25-29.18, 1.71-46.88 and 14.85-58.87 mg/kg respectively. Steps to reduce cadmium contents in cephalopods for consumption and export are discussed.
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