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.