ET ISO 6611: Milk and milk products

0 downloads 0 Views 1MB Size Report
ISO 7218, Microbiology of food and animal feeding stuffs — General rules for microbiological ... ISO 8261│IDF 122:2001, Milk and milk products — General guidance for the .... Transfer to each dish, by means of a sterile pipette (6.4), 1 ml of.
(7+,23,$1 67$1'$5'





(6,62

 )LUVWHGLWLRQ















Milk and milk products ² Enumeration of colony-forming units of yeasts and/or moulds ² Colony-count technique at 25 °C



,&6 

3XEOLVKHGE\(WKLRSLDQ6WDQGDUGV$JHQF\    ©ESA



 













(6,62

)RUHZRUG 7KLV (WKLRSLDQ 6WDQGDUG KDV EHHQ SUHSDUHG XQGHU WKH GLUHFWLRQ RI WKH 7HFKQLFDO &RPPLWWHH IRU 0LON DQG 0LON 3URGXFWV 7&   DQG SXEOLVKHG E\ WKH (WKLRSLDQ 6WDQGDUGV $JHQF\ (6$  7KH VWDQGDUG LV LGHQWLFDO ZLWK ,62 0LONDQGPLONSURGXFWV²(QXPHUDWLRQRIFRORQ\IRUPLQJXQLWVRI\HDVWVDQGRUPRXOGV²&RORQ\FRXQWWHFKQLTXH DWƒ&SXEOLVKHGE\WKH,QWHUQDWLRQDO2UJDQL]DWLRQIRU6WDQGDUGL]DWLRQ,62 )RUWKHSXUSRVHRIWKLV(WKLRSLDQ6WDQGDUGWKHDGRSWHGWH[WVKDOOEHPRGLILHGDVIROORZV

x dŚĞƉŚƌĂƐĞ͞/ŶƚĞƌŶĂƚŝŽŶĂů^ƚĂŶĚĂƌĚ͟ƐŚĂůůďĞƌĞĂĚĂƐ͞ƚŚŝŽƉŝĂŶ^ƚĂŶĚĂƌĚ͖͟ĂŶĚ   x A  full  stop  (.)  shall  substitute  comma  (,)  as  decimal  marker. 

ŝŝ   

ETHIOPIAN STANDARD

ES ISO 6611:2012

Milk and milk products ² Enumeration of colony-forming units of yeasts and/or moulds ² Colony-count technique at 25 °C

1

Scope

7KLV ,QWHUQDWLRQDO 6WDQGDUG VSHFLILHV D PHWKRG IRU WKH GHWHFWLRQ DQG HQXPHUDWLRQ RI FRORQ\IRUPLQJ XQLWV &)8  RI YLDEOH \HDVWV DQGRU PRXOGV LQ PLON DQG PLON SURGXFWV E\ PHDQV RI WKH FRORQ\FRXQW WHFKQLTXH DW ƒ& 7KHPHWKRGLVDSSOLFDEOHWR  PLONOLTXLGPLONSURGXFWV  GULHGPLONGULHGVZHHWZKH\GULHGEXWWHUPLONODFWRVH  FKHHVH  DFLGFDVHLQODFWLFFDVHLQUHQQHWFDVHLQ  FDVHLQDWHDFLGZKH\SRZGHU  EXWWHU  IUR]HQPLONSURGXFWV LQFOXGLQJHGLEOHLFHV   FXVWDUGGHVVHUWVIHUPHQWHGPLONDQGFUHDP 127( 7KLV PHWKRG LV QRW VXLWDEOH IRU D ODUJH QXPEHU RI WKHUPRODELOH \HDVWV LQ IUHVK FKHHVH  ,Q VXFK FDVHV WKH DJDUVXUIDFHSODWLQJPHWKRGLVSUHIHUUHG

2

Normative references

7KH IROORZLQJ UHIHUHQFHG GRFXPHQWV DUH LQGLVSHQVDEOH IRU WKH DSSOLFDWLRQ RI WKLV GRFXPHQW )RU GDWHG UHIHUHQFHV RQO\ WKH HGLWLRQ FLWHG DSSOLHV )RU XQGDWHG UHIHUHQFHV WKH ODWHVW HGLWLRQ RI WKH UHIHUHQFHG GRFXPHQW LQFOXGLQJDQ\DPHQGPHQWV DSSOLHV ,62Microbiology of food and animal feeding stuffs ² Preparation of test samples, initial suspension and decimal dilutions for microbiological examination ² Part 1: General rules for the preparation of the initial suspension and decimal dilutions ,62Microbiology of food and animal feeding stuffs ² General rules for microbiological examinations ,62°,') Milk and milk products ² General guidance for the preparation of test samples, initial suspensions and decimal dilutions for microbiological examination

©ESA

 

1



ES ISO 6611:2012

3

Terms and definitions

)RUWKHSXUSRVHVRIWKLVGRFXPHQWWKHIROORZLQJWHUPVDQGGHILQLWLRQVDSSO\ 3.1 yeasts and moulds PLFURRUJDQLVPV ZKLFK DW ƒ& IRUP FRORQLHV LQ D VHOHFWLYH PHGLXP XQGHU WKH FRQGLWLRQV VSHFLILHG LQ WKLV ,QWHUQDWLRQDO6WDQGDUG

4

Principle

4.1 3RXUHGSODWHVDUHSUHSDUHGXVLQJDVSHFLILHGVHOHFWLYHFXOWXUHPHGLXPDQGDVSHFLILHGTXDQWLW\RIWKH WHVWVDPSOHLIWKHLQLWLDOSURGXFWLVOLTXLGRURIDQLQLWLDOVXVSHQVLRQLQWKHFDVHRIRWKHUSURGXFWV 2WKHU SODWHV DUH SUHSDUHG XQGHU WKH VDPH FRQGLWLRQV XVLQJ GHFLPDO GLOXWLRQV RI WKH WHVW VDPSOH RU RI WKH LQLWLDOVXVSHQVLRQ 7KHSODWHVDUHDHURELFDOO\LQFXEDWHGDWƒ&IRUGD\V

4.2

4.3 7KHQXPEHURIFRORQ\IRUPLQJXQLWV &)8 RI\HDVWVDQGRUPRXOGVSHUJUDPRUSHUPLOOLOLWUHRISURGXFW LV FDOFXODWHG IURP WKH QXPEHU RI FRORQLHV REWDLQHG RQ SODWHV FKRVHQ DW GLOXWLRQ OHYHOV VR DV WR JLYH D VLJQLILFDQWUHVXOW

5

Diluents and culture medium

)RUJHQHUDOJXLGDQFHVHH,62 5.1

Basic materials

6HH,62°,') 5.1.1

Diluents

)RUGLOXHQWVIRUJHQHUDOXVHDQGGLOXHQWVIRUVSHFLDOSXUSRVHVVHH,62°,') 5.1.2

Distribution, sterilization and storage of diluents

6HH,62°,') 5.2

Yeast extract/dextrose/oxytetracycline/agar medium

5.2.1 5.2.1.1

Basic medium Components