CAC_GL 33-1999 Recommended Methods Of Sampling For The Determination Of Pesticide Residues For Compliance With Mrls
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ID： |
064018EE7D0A46569B007BFF1000AEFD |
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文件大小(MB)： |
0.07 |
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页数： |
20 |
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文件格式： |
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日期： |
2007-3-16 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
CAC/GL 33 Page 1 of 20,RECOMMENDED METHODS OF SAMPLING FOR THE DETERMINATION OF,PESTICIDE RESIDUES FOR COMPLIANCE WITH MRLS,CAC/GL 33-1999,CONTENTS,Pages,OBJECTIVE. 1,PRINCIPLES 1,SAMPLING PROCEDURES 2,CRITERIA FOR DETERMINING COMPLIANCE 3,TABLE 1. MINIMUM NUMBER OF PRIMARY SAMPLES TO BE TAKEN FROM A LOT .. 4,(a) Meat and poultry . 4,(b) Other products.. 4,TABLE 2. NUMBER OF RANDOMLY SELECTED PRIMARY SAMPLES REQUIRED FOR,A GIVEN PROBABILITY OF FINDING AT LEAST ONE NON-COMPLIANT,SAMPLE IN A LOT OF MEAT OR POULTRY, FOR A GIVEN INCIDENCE OF,NON-COMPLIANT RESIDUES IN THE LOT 5,TABLE 3. MEAT AND POULTRY PRODUCTS: DESCRIPTION OF PRIMARY SAMPLES,AND MINIMUM SIZE OF LABORATORY SAMPLES .. 6,TABLE 4. PLANT PRODUCTS: DESCRIPTION OF PRIMARY SAMPLES AND MINIMUM,SIZE OF LABORATORY SAMPLES.. 9,TABLE 5. EGG AND DAIRY PRODUCTS: DESCRIPTION OF PRIMARY SAMPLES AND,MINIMUM SIZE OF LABORATORY SAMPLES. 11,ANNEX I. DEFINITION OF TERMS. 13,ANNEX II.A SCHEMATIC REPRESENTATION OF SAMPLING: MEAT AND POULTRY.. 17,ANNEX II.B SCHEMATIC REPRESENTATION OF SAMPLING: PRODUCTS OTHER THAN,MEAT AND POULTRY 18,ANNEX III. EXAMPLES.. 19,REFERENCES. 20,RECOMMENDED METHODS OF SAMPLING FOR THE DETERMINATION OF,PESTICIDE RESIDUES FOR COMPLIANCE WITH MRLS,1. OBJECTIVE,The objective of these sampling procedures is to enable a representative sample to be obtained,from a lot, for analysis to determine compliance with Codex Maximum Residue Limits (MRLs),for pesticides.,2. PRINCIPLES,2.1 Codex MRLs are based on Good Agricultural Practice data and foods derived from commodities,that comply with the respective Codex MRLs are intended to be toxicologically acceptable.,2.2 A Codex MRL for a plant, egg or dairy product takes into account the maximum level expected to,occur in a composite sample, which has been derived from multiple units of the treated product,and which is intended to represent the average residue level in a lot. A Codex MRL for meat and,poultry takes into account the maximum level expected to occur in the tissues of individual treated,animals or birds.,CAC/GL 33 Page 2 of 20,2.3 In consequence, MRLs for meat and poultry apply to a bulk sample derived from a single primary,sample, whereas MRLs for plant products, eggs and dairy products apply to a composite bulk,sample derived from 1-10 primary samples.,3. SAMPLING PROCEDURES,Notes. (a) The terms used are defined in Annex I and the procedures are shown schematically in,Annexes IIA and IIB.,(b) ISO recommendations for sampling of grain1, or other commodities shipped in bulk,may be adopted, if required.,3.1 Precautions to be taken,Contamination and deterioration of samples must be prevented at all stages, because they may,affect the analytical results. Each lot to be checked for compliance must be sampled separately.,3.2 Collection of primary samples,The minimum number of primary samples to be taken from a lot is determined from Table 1, or,Table 2 in the case of a suspect lot of meat or poultry. Each primary sample should be taken from,a randomly chosen position in the lot, as far as practicable. The primary samples must consist of,sufficient material to provide the laboratory sample(s) required from the lot.,Note. (a) Sampling devices required for grain1, pulses2 and tea3 are described in ISO,recommendations and those required for dairy products4 are described by the IDF.,3.3 Preparation of the bulk sample,3.3.1 Procedure for meat and poultry (Table 3),Each primary sample is considered to be a separate bulk sample.,3.3.2 Procedure for plant products, eggs or dairy products (Tables 4 and 5),The primary samples should be combined and mixed well, if practicable, to form the bulk sample.,3.3.3 Alternative procedure where mixing to form the bulk sample is inappropriate or impractical,Where units may be damaged (and thus residues may be affected) by the processes of mixing or,sub-division of the bulk sample, or where large units cannot be mixed to produce a more uniform,residue distribution, the units should be allocated randomly to replicate laboratory samples at the,time of taking the primary samples. In this case, the result to be used should be the mean of valid,results obtained from the laboratory samples analyzed.,3.4 Preparation of the laboratory sample,Where the bulk sample is larger than is required for a laboratory sample, it should be divided to,provide a representative portion. A sampling device, quartering, or other appropriate size,reduction process may be used but units of fresh plant products or whole eggs should not be cut or,broken. Where required, replicate laboratory samples should be withdrawn at this stage or they,may be prepared as in 3.3.3, ……
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