Method of sampling and Analysis of Food grains Flashcards
“Terminology of food grains” BIS (Bureau of Indian Standard is
IS: 2813-1995
“Method of sampling of cereals and pulses” BIS is
IS:14818:2000
“Method of analysis for food grains” BIS no are
IS: 4333 (PART-I) :1996
IS: 4333 (PART-II) : 2002
Small equal quantity of grain taken from each individual sampling point throughout the lot is called
Increment
Terminology used for one wagaon or one lorry or one ship is
Laden
Terminology used for quantity of grains obtained by combining and mixing the increments taken from a specific lot is
Bulk Sample/Composite sample
Terminology used for quantity of grains removed from the bulk sample and intenden for analysis or other examination
Laboratory sample/Test sample
Instrument required for sampling and analysis is described in BIS
IS 14818:2000
Sampling with Parkhi is described in BIS
IS 2816:1964 (R 1994)
If the buyer desire to make composite sample without Parkhi he shall have the option to open and sample _______ % of the bags to make it
10
In FCI which type of dividers is used for division of sample as BIS 14818:2000
Conical dividers (Boerner type)
Conical divider (Boerner type) is calibrated to provide accuracy of ______% between pans on a _______ gm sample
1 , 1000
How many pocket are there around the base of the Conical divider (Boerner type)
38 openings or pockets
Sensitivity of physical balance is ______mg
5
Which four types of IS Sieves shall be used
Top. 4.00 mm
Second from top. 3.35 mm
Third from top. 1.70 mm
Forth from top. 1.00 mm
A solid bottom pan at the bottom
Enamelled Plates _____cm in diameter with raised rims
30 cm
Height of small scoop should be
Height (mm) - 25
Small Scoop Lenght (mm) and Width(mm)
Length - 105 , width-100
Length - 75 , width - 65
Length - 25 , width - 20
Forceps of about ______ cm in length
10
Magnifying glass with a handle of _______ cm length and having magnifications of _____X
7.5 , 10
Dehusk test kit contains
Methylene blue (0.05% by wt)
Dissolve 0.5 Gms in 1000ml of distilled water
HCL - 50ml Lab grade Hcl(approx 36% assay)+ 950 ml distilled water
Metanil yellow. 0.05% by wt)
Dissolve 0.5 Gms in 1000 ml distilled water
Distilled water
Petri dish 80 X 70 mm)
Forceps (about 10 cm in lenght)
How many Grams Dehusked grain test done
5 grams (Sound head rice and Broken)
Sequence of Dehusk Test of Rice
- 5 grams rice (sound grain and broken)
Count total number of grains in 5 gm (3 broken = 1 sound grain - 20ml methylene Blue solution for 1min
- Swirl wash with 20ml HCL (5% HCL solution by volume in distilled water
- swril wash with water
- 20ml Metanil yellow solution for 1 min
- wash with fresh water twice
The moisture meter under use shall have a sensitivity of_______
+_0.2%
For measurement of lenght and thickness of grain which instrument is used.
Grain Vernier
Sampling of food grains done from what types of storage
- Sampling from Bags
- Sampling from rail or raod wagons, lorries, barges or ships
- Sampling from silos, Bins or Warehouses
Sampling through bags done from no of bags if no of bags in consignment is
Upto 10
10 to 100
more than 100
200 bags
500 bags
2000 bags
upto 10 - Each Bags
10 to 100 - 10, taken at random
More than 100 - Square root (approx of the total number)
200 bags - Square root i.e 15 bags
500 bags- Square root i.e 23 bags
2000 bags - Suare root i.e 45 bags
Sampling from rail or road Wagons, barges or ships , the. grains should be samples using a __________ system
Grid System
Sampling using grid system samples are taken according to tonnage are
upto 15 tonnes _________Sampling points
15 to 30 tonnes _________Sampling points
30 to 500 tonnes ________Sampling points
Above 500 tonnes _____________
Upto 15 tonnes - 5
15 to 30 tonnes - 8
30 to 500 tonnes - 11
Above 500 tonnes - Next whole number of Square root of tonnage/2
Sampling from silos, Bins or warehouse should be sampled using a __________ system
Take the ________ of tonnage (in static bulk) ,Divide by ______ and round up to next whole number
Grid system , Square root , 2
Tonnage, Square root and number of increments of given tonnage are
500- ______Square root , ________no of increments
1000______Square root, _________no of increments
2000______Square root, _________no of increments
4000______Square root, _________no of increments
6000______Square root, _________no of increments
8000______Square root,_________ no of increments
10000_____Square root,_________ no of increments
500—- 22.4 , 12
1000– 31.6 , 16
2000– 44.7 , 23
4000– 63.2 , 32
6000– 77.4 , 39
8000– 89.4 , 45
10000-100.0 , 50
A “Composite Sample” of about _______Gms shall be drawn on the basis of IS___________
2500 , 2814:1978 & 3714:1978
The composite sample shall be reduced to about ______gms by dividing on a _____________
500 , Sample divider
Test sample weight for
Barley
Maize
Wheat
Gram
Other pulses
R
M
Barley - 500 gms
Maize. - 500 gms
Wheat - 500 gms
Gram. - 500 gms
Other pulses - 500gms
R - 250 gms
M - 250 gms
Foreign matter is determined from the _________
“Test Sample”
Determination of Refraction and foreign matter is through BIS ____________
IS 4333 (Part-I) -1996
Scooped sample weight (Min)
Barley
Maize
Wheat
Gram
Other pulses
Rice
Millet
Barley - 50gms
Maize - 50gms
Wheat -50gms
Gram. - 50gms
Other pulses - 25gms
Rice —– 20gms
Millets— 20gms
Determination of Insect Damaged(weeviled) grains : IS 4333 (Part I):1996 for
Bigger Size grains
Smaller size grains
Bigger size grains - By Number -measure 20 ml of the representative sample with the help of measuring cylinder First count the total number.
Smaller size grains - Any of the two (method used shall be declared while reporting the result)
1.Volumetri method (by Volume)- measure 20ml , picked our and volume of weeviled grain should be measured in same measuring cylinder
2.Gravimetric method (be mass) - weight 20 gm of representative sample in a chemical balance with least count of 0.1mg
Determination of Moisture Content is described in BIS
IS 4333(PART 2): 2002 , ISO-712
(except Maize)
For Maize a separate method is specified in ISO-6540
In Determination of moisture content
Analytical balance accuracy is_______
and
Oven temperature between _______
+-0.001gm
130-133 degree C
Grinding Without pre-conditioning Moisture range is between ________ and ________
7%
17% (15% in oat, paddy and rice)
Grinding with pre-conditioning temprature below ___________ and above ___________
<7%
> 17%
Test portion for Moisture content is ______ gms
5gms +-1gm
For moisture determining ,Drying in the oven and leave for _________ min (90 min for flours) from the moment when the oven temperature is ________
120 min +- 5min
130 +- 3 degree celcius
Scale of sampling in produce Market(Mandi)
up to 100 lots——Number of samples_______
100 to 199 lots—–Number of samples_______
200 to 399 lots—–Number of samples_______
400 and above —-Number of samples_______
100 —- 4 samples (1 from each grade/Variety)
100 to 199– 7 samples (1 from each grade/variety)
200 to 399–10 samples(2 from each grade/variety)
400—- 12 samples (3 from each grade/variety)
“cotton cloth” Sample bag specification in BIS is:-
IS 187:1978
Dimension of cotton sample bag is :-
30 cm X 25 cm (To hod 2 kg of sample)
Specifications of polythene Sample bag(film confirming to grade 001) for moisture sample is according to BIS
IS 2508-1984
The thickness of the polythene film to be used for the manufacture of sample bag for moisture sample shall be between ______ mm and ________mm (300 to 400 gauge)
0.075 , 0.100
Dimension for Polythene sample bag for moisture sample
150 mm , 100 mm
Order of Refractions are
- Other food grain
- Damaged
- Discoloured
- Insect Damaged
- Fragments
- Broken
- Slightly damaged or touched
- Chalky (in case of raw rice)
- Red grains(rice)
- Kernel with husk
- Shrivelled or immature
- Varietal admixture
