NZTDS

NZTDS From typical diets and 180-300 Vannoort and Thomson 

Notes-. NZTDS, New Zealand Total Diet Survey. Iodine Intakes (rrg/day) In New Zealand from the 1920s to 2000s estimated from typical diets and concentrations In foods, or from dally urinary excretion assuming that approximately 90% of Intake Is excreted In urine. 

In the 1997/98 NZTDS, some 2,440 food samples were collected. After compositing some samples of the same food type, 460 samples were actually screened, with 272 samples (59%) being found to contain detectable residues. 

In New Zealand, the 1997/98 NZTDS food list consisted of 114 different commodities, representing about 70% of those most commonly consumed by New Zealanders. 

A distinguishing characteristic of Total Diet Surveys like the NZTDS (Cressey et al., 2000) is that foods are analysed as normally consumed (e.g. bananas peeled, meat cooked etc.). They therefore frequently provide the most relevant means of assessing the consumer s exposure. A Total Diet Survey is essentially a public health risk assessment tool, and not a compliance monitoring tool. 

Fig. 10.3 Estimated daily dietary exposure to total DDT for a young male (YM) in the 1997/98 New Zealand Total Diet Survey (NZTDS) compared to previous NZTDSs (adapted from Cressey et al., 2000).

It is interesting that a comparison of concentrations analyzed 80 years later for the 2003—2004 New Zealand Total Diet Survey (NZTDS) (Vannoort and Thomson, 2005) indicates that the iodine content of cereals, fruits, vegetables and meat is similar to the previous values (Table 129.1). 

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