Page 1 :
1:47 OH @™M e Tul ©, , e, , vo >D Qt 4+ EE, , Limit Test, , ¢ Definition:- Limit test are quantitative, or semi-quantitative tests designed to, identify and control small quantities of, impurities, which are present in the, substance., , . Limit test are the tests which are, performed to know whether the impurities, in the substance are below limit or beyond, limit., , , , 31 32 33 34

Page 2 :
1:47 OH @™M , e, , , , |, , Limit Test, , > ot +, , Importance of limit Test, To find out the harmful amount of impurities., To fond out the avoidable unavoidable amount, , of impurities, , Meroe 9 cytraer, , , , 32 33, , fe Sle, , ES

Page 3 :
1:47 OH @™ e fe “ul ©, , ¢ aw p & + B&B, , LIMIT TEST FOR CHLORIDE, , Principle:, , if chloride ions impurity present in the sample, then its reacts with silver nitrate reagents, in the, presence of dilute nitric acid it forms white, precipitates of silver chloride., It is observed as Opalescence/Turbidity., , Cl- + AgNo, = . AgCl + No,, Chlorideion _ silver nitrate nitric acid Silver chloride nitrate ion, Nitric acidProvide acidic condition for reaction. Opalescence produces, , Prevents ppt. of other radicals., , , , 32

Page 4 :
32, , , , 1:47 OH @™M , ¢ «a Pp, , , , , , Procedure:TEST SAMPLE STANDARD COMPOUND, Specific weight of compound/ sample is | Take 1ml of 0.01 N HCL solution in, dissolved in water or solution is prepared Nessler cylinder, , as directed in the pharmacopoeia and, transferred in Nessler cylinder, , , , Add 1m of nitric acid, , Add 1m of nitric acid, , , , Dilute to 50ml in Nessler cylinder, , Dilute to 50ml in Nessler cylinder, , , , Add 1ml of 5% AgNO, solution, , Add 1iml of 5% AgNO, solution, , , , Keep aside for 5 min, , Keep aside for 5 min, , , , , , Observe the Opalescence/Turbidity, , , , Observe the Opalescence/Turbidity, , , , , , Observation:, , The opalescence produce in sample solution should not be greater, , than standard solution., , If opalescence produces in sample solution is less than the, standard solution, the sample will pass the limit test of chloride, , and visa versa.