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Chlorine and Starch Ts Assay

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Chlorine and Starch Ts Assay
QUALITY CONTROL LABORATORY Mam Dawn
Assay of HCL
Aqueous
Alkalimetry
Direct titration
0.1N NaOH
Methyl Red TS
HCL + NaOH NaCl + H2O
Assay of Diluted H3PO4
Aqueous
Alkalimetry
Direct titration
0.1N NaOH
Thymolphthalein TS
H3PO4 + 2NaOH Na2HPO4 + 2H2O
Assay of H3BO3
Aqueous
Alkalimetry
Direct titration
0.1N NaOH
Phenolphthalein TS
H3BO3 H+ + BO2- + H2O

Assay of Tartaric Acid
Aqueous
Alkalimetry
Direct titration
0.1N NaOH
Phenolphthalein TS
H2C4H4O6 + 2NaOH Na2C4H4O6 + 2H2O
Assay of 2-phenoxy-ethanol
Aqueous
Alkalimetry
Direct titration
0.1N NaOH
Phenolphthalein TS
C6H5OCH2CH2OH + CH3C =O

C6H5OCH2OCOCH3 + CH3COOH
Assay of Aspirin capsules
Aqueous
Alkalimetry
Residual titration
0.1N NaOH
Phenolphthalein TS
C6H4OCOCH3COOH + NaOH
C6H4OCOCH3COONa+ H2O
Assay of Metacholine Chloride
Non Aqueous
Acidimetry
Blank titration
Perchloric acid
Mercuric acetate TS
Crystal violet TS
2 Cl- + Hg (OAC)2 + 2HClO4

2 ClO4- + 2HOAc + 2HgCl2 Assay of Phenytoin
Non Aqueous alkalimetry Blank titration
Sodium methoxide
Saturated sol’n of Azo violet in Benzene H
C6H5 N--C=O C
C6H5 C-NH + CH3O- O

C6H5 N=C-O C
C6H5 C-NH + CH3OH O

OXIDATION-REDUCTION REACTION

OXIDATION-REDUCTION REACTION: IODIMETRIC AND IODOMETRIC METHOD

SUBSTANCE TO BE ASSAY
AQUEOUS/NON-AQUEOUS
ALKALINITY / ACIDIMETRY
DIRECT/RESIDUAL TITRATION
TITRANT
INDICATOR
CHEMICAL REACTION
Assay of Antimony potassium tartrate

Direct titration
0.1 N Iodine
Starch TS
KOOCCHOHCHOHCOO (SbO) + I2 + H2O KOOCCHOHCHOHCOO (SbO2) + 2HI + 2HI + 2NaHCO3 2NaI + 2H2O +
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