Chlorine and Starch Ts Assay

Topics: Chlorine, Sodium, Ammonia Pages: 5 (498 words) Published: September 22, 2014
 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 + 2CO2 Assay of Strong iodine sol’n

Direct titration
0.1 N Potassium arsenite
Starch TS

Assay of Methionine

Residual titration
0.1 N Sodium thiosulfate
Starch TS
CH3SH – CH2CH2CH (NH2) COOH + I2
CH3---CH2 + 2HI

HN CH2
C
H COO-

Assay of Selenium sulfide

Residual titration
0.05 N Sodium thiosulfate
Starch TS
SeS2 + 16HNO3 H2SeO3 + 2H2SO4 + 16NO2 + 5H2O
Assay o fSodium hypochlorite sol’n

Residual titration
0.1 N Sodium thiosulfate
Starch TS
HOCl +2KI + HOAc I2 + KCl + KOAc + H2O
Assay of Cupric sulfate

Residual titration
0.1 N Sodium thiosulfate
Starch TS
2CuSO4 5H2O + 4KI 2CuI + I2 + 2K2SO4 + 10H2O

PRECIPITATION REACTION
SUBSTANCE TO BE ASSAY
AQUEOUS/NON-AQUEOUS
ALKALINITY / ACIDIMETRY
DIRECT/RESIDUAL TITRATION
TITRANT
INDICATOR
CHEMICAL REACTION
Assay of Phenylmercuric nitrate for mercury content

Direct titration
Ammonium thiocyanate
Potassium permanganate TS
Hydrogen peroxide TS
Ferric ammonium sulfate TS
Hg + 2HNO3 Hg(NO3)2 + 2NH4NO3
Hg(NO3)2 + 2NH4SCN Hg(SCN)2 + 2NH4NO3
Assay of Sodium lauryl sulphate for NaCl content

Direct titration
Silver nitrate
Potassium chromate TS
AgNO3 + NaCl AgCl + NaNO3
Assay of Iopanoic acid tablet

Direct titration
Silver nitrate
Tetrabromophenolphthalein ethyl ester TS

Assay of Benzyltrimethylammonium chloride

Direct titration
Silver nitrate
Dichlorofluorescein

Assay of Sodium chloride

Residual titration
Ammonium thiocyanate
Ferric ammonium sulfate
AgCl + N4SCN AgSCN +

NH4Cl
NaCl + AgNo3 AgCl + NaNO3
Assay of Iodide content in Povidone-iodine

Residual titration
Silver nitrate
Bisulfite TS

Assay of Theophylline

Residual titration
Ammonium thiocyanate
Ferric ammonium sulfate TS
Ammonia...
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