in situ analysis of bottled water line operators
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In-situ analysis of bottled water – line operators
Types of Bottled Water from Underground Sources (FDA Rules)
• Well water: Any underground water
• Artesian well water: Underground water under pressure with a confining layer of rock or clay.
• Spring water: Underground water that flows naturally to the surface.
• Mineral water: Underground water with high mineral content. Minerals may not be added.
• Turbidity• Color• Odor• Taste
1. Organoleptic Parameters
Physical-Chemical Analysis
Color OdorThe solution may not have any smell.Or else, it is contaminated.
Turbidity
Physical-Chemical Analysis
Taste The bottled water shouldn’t have any taste.
pHIntroduce a piece of paper in the solution, compare the colour with the standard colours, trying to find a conclusion.
Universal indicator paper
Physical-Chemical Analysis
• pH• Alkalinity• Conductivity• Hardness• Suspended Solids
2. Global Parameters
Physical-Chemical Analysis
ConductivityIntroduce the electrode in the solution, wait for the value to stabilize.
Conductivity meter
Physical-Chemical Analysis
[HCl] = 0,0245M
Alkalinity
150 mL (Sample)
TA(indicator : phenolphthalein) , pH = 8,3
Physical-Chemical Analysis
Pink Colorless
TA = (mg CaCO3/L)
C – volume required in the the titration
HCl
[HCl] = 0,0245M
Alkalinity (continuing titration)
150 mL (Sample)
TAC (indicator: methyl orange), pH = 4,4
Physical-Chemical Analysis
Orange Red
TAC = (mg CaCO3/L)
D – volume required in the the titration
HCl
[EDTA] = 0,013M
Hardness
50 mL of sample
Indicator: ETB
Blue Pink
Hardness = (mg CaCO3/L)
E – volume required in the the titration
Physical-Chemical Analysis
Total Suspended Solids1. Weigh the filter paper (dried in an oven and placed and desiccator until constant weight, B);2. Pipetting a sample volume (150 mL) for the filter;2. Proceed to the suction of the sample;3. Place in the oven at 103 - 105°C.4. Allow to cool in desiccator to constant weight, A.
Physical-Chemical Analysis
mg TSS/L =
Quiz Multiple Choice Questions
1- Which are the organoleptic parameters that are used to analyse water?
A. Total Suspended Solids.B. Turbidity, color, odor and pH. C. Turbidity, color, odor and taste.D. Conductivity and Alkalinity.
2- Which are the global parameteres that are used to analyse water?
A. Turbidity, color, odor and pH. B. pH, alkalinity, conductivity, hardness and total suspended solids.C. Hardness.D. Turbidity, color, odor and taste.
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