Honey

• DETERMINATION OF ASH 

   Weigh accurately 2-2.5 gm of honey in to a crucible. This is previously weighed and adds a few drops of vegetable oil to prevent spattering Heat carefully over a low flame until swelling ceases ignite in a muffle Furness till white ash is obtained. Cool the dish in a desecrator and weigh repeated to constant weight.

CALCULATION 

Ash % by mass =   (W2-W) *100  
                                        W1-W 

Where

             W2 =weight of the crucible with ash
              W1= weight of the crucible with the material taken for test.
                W=weight of the empty crucible.

EXAMPLES:-

                           Weight of crucible alone = 19.1598
                            Weight of sample taken = 2.0911
Weight of sample + crucible after 3 hour = 19.1647

                                                Ash %           =   (19.1647-19.1598)*100
                                                                                    2.0911
                                                                      = 0.23

• ACIDITY

 Weigh out 10gm of honey in a suitable titration flask dissolve it in 75ml of distilled water mix thoroughly. Titrate against 0.1N NAOH solution using phenolphthalein indicator solution pink color of indicator persists at least 10 second.

CALCULATION

Acidity % as formic acid by mass = 4.6*V*N
                                                                 W

Where

             V=volume of NAOH required
             N= normality of NAOH
            W= weight of sample take

EXAMPLE:-

      Weight of sample=10.0042gm

                       Acidity =     4.6*3.3*0.1004317
                                             10.0042
                                     = 0.15