, THE PERCENTAGES OF WHICH ARE LAID DOWN IN ARTICLE 1 TO 5 , MUST BE WEIGHED VERY CAREFULLY TO THE NEAREST 0.01 GRAMMES AND DISTRIBUTED ACCORDING TO PERCENTAGE OVER THE AVERAGE SAMPLE . THE PARTICULARS ENTERED IN THE ANALYSES REPORT SHALL BE TO THE NEAREST 0.1 % . CHECK FOR LIVE PESTS .
AS A GENERAL RULE , TWO ANALYSES MUST BE MADE FOR EACH SAMPLE . THEY MUST NOT DIFFER BY MORE THAN 10 % IN RESPECT OF THE TOTAL OF THE ABOVEMENTIONED MATTER .
4 . THE APPARATUS TO BE USED FOR THE OPERATIONS REFERRED TO IN 1 , 2 AND 3 IS AS FOLLOWS :
( A ) SAMPLE SEPARATOR , E.G . A CONICAL OR GROOVED APPARATUS ;
( B ) PRECISION OR ASSAY BALANCE ;
( C ) SIEVES WITH APERTURES OF 1 MILLIMETRE , 1.8 MILLIMETRES , 1.9 MILLIMETRES , 2 MILLIMETRES , 2.2 MILLIMETRES , AND 3.5 MILLIMETRES AND A SIEVE WITH A 4.5 MILLIMETRE ROUND MESH . THE SIEVES MAY BE FITTED TO A VIBRATING TABLE .
ANNEX II
STANDARD METHOD OF TESTING FOR MOISTURE CONTENT
1 . PRINCIPLE :
THE PRODUCT IS DRIED AT A TEMPERATURE OF 130 TO 133 * C , UNDER NORMAL ATMOSPHERIC PRESSURE , FOR A PERIOD OF TIME FIXED BY RULE OF THUMB ACCORDING TO THE SIZE OF THE PARTICLES .
2 . FIELD OF APPLICATION :
THIS DRYING METHOD APPLIES TO CEREALS CRUSHED INTO PARTICLES OF WHICH AT LEAST 50 % PASS THROUGH A SIEVE WITH 0.5 MILLIMETRE MESH AND LEAVE NOT MORE THAN 10 % RESIDUE ON THE SIEVE WITH A 1 MILLIMETRE ROUND MESH .
IT ALSO APPLIES TO FLOUR .
3 . APPARATUS :
PRECISION BALANCE .
CRUSHER MADE OF A MATERIAL WHICH DOES NOT ABSORB MOISTURE , IS EASY TO CLEAN , ENABLES CRUSHING TO BE EFFECTED QUICKLY AND EVENLY WITHOUT OVERHEATING , LIMITS CONTACT WITH THE OUTSIDE AIR TO THE MINIMUM , AND MEETS THE REQUIREMENTS MENTIONED IN 2 ( E.G . A DETACHABLE ROLLER MILL ) .
RECEPTACLE MADE OF NON-CORRODIBLE METAL OR GLASS , FITTED WITH A GROUND LID ; WORKING SURFACE ALLOWING DISTRIBUTION OF THE TEST SAMPLE AT 0.3 GRAMMES PER SQUARE CENTIMETRE .
ELECTRICALLY HEATED ISOTHERMIC HEATING CHAMBER , SET AT A TEMPERATURE OF 130 TO 133 * C ( 1 ) , HAVING ADEQUATE VENTILATION ( 2 ) .
DRYER WITH A METAL OR , FAILING METAL , PORCELAIN PLATE , THICK , PERFORATED , CONTAINING SILICA GEL IMPREGNATED WITH COBALT CHLORIDE OR ANY OTHER SUITABLE DEHYDRATOR .
4 . METHOD :
( A ) DRYING :
WEIGH AT LEAST 5 GRAMMES OF THE CRUSHED SUBSTANCE IN THE PRE-WEIGHED RECEPTABLE . PLACE THE RECEPTABLE IN A HEATING CHAMBER HEATED TO 130 * C . TO PREVENT TOO GREAT A DROP IN TEMPERATURE THE RECEPTACLE MUST BE INTRODUCED IN AS SHORT A TIME AS POSSIBLE . LEAVE TO DRY FOR TWO HOURS AFTER THE HEATING CHAMBER REGAINS A TEMPERATURE OF 130 * C . REMOVE