Transcription of สารละลายมาตรฐาน - reo13.go.th
1 13 ( ).. (Titrimetric Analysis) .. (Titration) .. 2 . 1. (Primary standard solution).. Class A .. SI .. 2. (Secondary standard solution) . (standardize) .. (Instrumental Analysis) UV Vis Spectrophotometer . (Standard Curve) .. 1. ( standardization ) .. (Hardness) . Titrimetric Method EDTA M . EDTA g 1 . CaCO3 M CaCO3 . g CO2 1 (1 ml = 1 mg CaCO3). EDTA M CaCO3 M CaCO3 M 10 ml . Eriochrome Black T EDTA. M . EDTA . C1V1 = C2V2. C1 = CaCO3 ( M). V1 = CaCO3 ( 10 ml). C2 = EDTA (M). V2 = EDTA (ml). EDTA . (titrant) . ( ) ( . ) . 50. ml Eriochrome Black T . EDTA EDTA blank . CaCO3. (mg/L) . CaCO3 (mg / L) = {(V ( EDTA) sample V ( EDTA) blank ) M 1000 }. Vsample (50 ml ). M = EDTA. V (EDTA) sample = Std. EDTA Soln (ml). V (EDTA) blank = Std. EDTA Soln blank (ml). V sample = (ml). 2. 1. (Impurity) - %.
2 2.. 3.. - mg 1 ppt . 200 mg 4. (Hydrated substance) .. 5.. 6.. - Calcium Carbonate (CaCO3) - Ethylene Diamine Tetraacetate (EDTA). - Potassium Hydrogen Iodate (KH(IO3)2) - Sodium Thiosulfate ( ). - Potassium Dicromate (K2Cr2O7) - Ferrous ammonium sulfate (FeSO4(NH4) ). - Sodium Carbonate (Na2CO3) - Sulfuric Acid (H2SO4).. 1. 5 2554 : 2. , 5 . 5 2554 : 3. 27 2554 3.
