Test 1 : Detection of extraneous matter (dust, pebble, stone, straw, weed seeds, damaged grain, weeviled grain, insects, rodent hair and excreta) in food grains
Testing Method:
- Take small quantity of sample in a glass plate.
- Examine the impurities visually.
- Pure food grains will not have any such impurities.
- Impurities are observed visually in adulterated food grains.
Pure
Pure
Adulterated
Adulterated
Test 2 : Detection of dhatura in food grains
Testing Method:
- Take small quantity of food grains in a glass plate.
- Examine the impurities visually.
- Dhatura seeds which are flat with edges and blackish brown in colour can be separated out by close examination.
- Impurities are observed visually in adulterated food grains.
Dhatura seeds in food grains
Dhatura seeds in food grains
Dhatura seeds
Dhatura seeds
Test 3 : Detection of excess bran in wheat flour
Testing Method:
- Take a transparent glass of water.
- Sprinkle a spoon of wheat flour on the surface of water.
- Pure wheat flour will not show excess bran on water surface.
- Impurities are observed visually in adulterated food grains.
Pure wheat flour
Pure wheat flour
Excess bran in wheat flour
Excess bran in wheat flour
Test 4 : Detection of khesari dal in dal whole and split
Testing Method:
- Take small quantity of dal whole or split in a glass plate.
- Examine the impurities visually.
- Khesari dal which has edged type appearance showing a slant on one side and square in appearance can be separated out by close examination.
- Pure dal will not have any such impurities.
Pure dal
Pure dal
Khesari dal
Khesari dal
Test 5 : Detection of added colour in food grains
Testing Method:
- Take a transparent glass of water.
- Add 2 teaspoons of food grains and mix thoroughly.
- Pure food grains will not leave any colour.
- Adulterated food grains leaves colour immediately in water.
Test 6 : Detection of turmeric in sella rice
Testing Method:
- Take a tea spoon of rice in a glass plate.
- Sprinkle a small amount of soaked lime (commonly known as chuna which is used in pan) on the rice grains.
- Pure grains will not form red colour.
- Adulterated grains will form red colour.
Pure
Pure
Adulterated
Adulterated
Test 7 : Detection of rhodamine B in ragi
Testing Method:
- Take cotton ball soaked in water or vegetable oil. (conduct the test separately).
- Rub the outer surface of the ragi.
- If cotton absorbs colour, then it indicates the adulteration of rhodamine B for colouring the outer surface of ragi.
Pure
Pure
Adulterated
Adulterated
Test 8 : Detection of chakunda beans in pulses
Testing Method:
- Take small quantity of pulses in a transparent glass plate.
- Examine the impurities visually.
- Chakunda beans can be separated out by close examination.
Chakunda beans
Chakunda beans
Test 9 : Detection of sand soil, insects, webs, lumps, rodent hair and excreta in Atta, Maida, Suji (Rawa)
Testing Method:
- These can be identified by visual examination.
Atta, Maida, Suji (Rawa)
Atta, Maida, Suji (Rawa)
Sand, Soil, insects, webs, lumps, rodent hair & excreta
Sand, Soil, insects, webs, lumps, rodent hair & excreta
