FOR PHYSICOCHEMICAL PA­RAM­E­TERS

Mois­ture and In­sol­u­ble Im­pu­ri­ties | Re­frac­tive In­dex | Saponi­fi­ca­tion Value | Io­dine Value | Un­saponifi­able Mat­ter | Acid Value | TBHQ | Flash Point | Phys­i­cal Ob­ser­va­tions | Hex­ane | Pres­ence of Arge­mone Oil | Pres­ence of Min­eral Oil

Consumer Voice - - Groundnut Oils -

Mois­ture and In­sol­u­ble Im­pu­ri­ties

Mois­ture and in­sol­u­ble im­pu­ri­ties may be present in ed­i­ble oils but these should be as low as pos­si­ble – In­dian Stan­dard and AGMARK have spec­i­fied the per­mis­si­ble limit at 0.1 per cent for re­fined oils (ex­pressed and sol­vent re­fined). • All brands were within the per­mis­si­ble limit. • Dhara scored high­est on this pa­ram­e­ter. Re­frac­tive In­dex (at 40 de­grees Cel­sius) Re­frac­tive in­dex of oil can be used to de­tect ran­cid­ity. It shall be in the range of 1.4620–1.4640. • All brands were within the spec­i­fied limit. They were clear and with­out any hazi­ness. • Dhara scored high­est on this pa­ram­e­ter. saponi­fi­ca­tion Value

The saponi­fi­ca­tion value helps to de­tect the pres­ence of other oils/fats. Saponi­fi­ca­tion value of ground­nut oil shall be be­tween 188 and 196. • All brands ex­cept RRO Primio were within the spec­i­fied limit. • Dhara scored high­est on this pa­ram­e­ter as well. Io­dine Value The io­dine value is a mea­sure of the un­sat­u­rated fats. It is ex­pressed in terms of the num­ber of

centi­grams of io­dine ab­sorbed per gram of sam­ple (% io­dine ab­sorbed). Io­dine value of ground­nut oil shall be in the range of 85–99.

Io­dine value of all brands fell within the spec­i­fied limit. • Dalda scored high­est on this pa­ram­e­ter.

Un­saponifi­able Mat­ter

Un­saponifi­able mat­ter shall not be more than 1.0 per cent by weight of ground­nut oil.

All brands were within the spec­i­fied limit.

acid Value

The acid value is the num­ber of mil­ligrams of potas­sium hy­drox­ide nec­es­sary to neu­tralise the free acids in one gram of sam­ple. Acid value shall not be more than 0.5 for re­fined oils. For fil­tered-type oils, the re­quire­ment is 6.0.

All brands were within the spec­i­fied limit.

TBHQ (an­tiox­i­dant)

An­tiox­i­dants are the per­mit­ted food ad­di­tives which when added to food prod­ucts pre­vent their

ox­ida­tive de­te­ri­o­ra­tion for bet­ter nu­tri­tional sta­bil­ity and qual­ity. FSS Reg­u­la­tions rec­om­mend that an­tiox­i­dants should not ex­ceed 0.02 per cent, or 200 ppm, in con­cen­tra­tion. We tested the 10 ground­nut oil brands for the an­tiox­i­dant TBHQ.

• TBHQ was not de­tected in Dhara, Gem­ini, Guinea and Gu­lab; in the rest of the brands it was within the max­i­mum rec­om­mended limit of 200 ppm.

Flash Point

The flash point of a volatile ma­te­rial is the low­est tem­per­a­ture at which it can va­por­ise to form an ig­nitable mix­ture in air. At the flash point, the vapour may cease to burn when the source of ig­ni­tion is re­moved. It should not be less than 250 de­grees C as per In­dian Stan­dard. Higher the flash point of ground­nut oil, lower is the risk of ig­ni­tion in the oil.

Flash point of all brands was found to be well above the spec­i­fied limit.

Hex­ane

In re­fined oils, hex­ane is used to ex­tract the oil from seeds. It shall not be more than 5 ppm as per In­dian Stan­dard. For fil­tered oils, no re­quire­ment

has been spec­i­fied be­cause hex­ane is not re­quired to ex­tract the oil from seeds. • Hex­ane was not de­tected in any of the brands, up to a de­tec­tion limit of 5 mg/kg.

Newspapers in English

Newspapers from India

© PressReader. All rights reserved.