Sensory Assessment of Water Quality - download pdf or read online

By B. C. J. Zoeteman

ISBN-10: 0080238483

ISBN-13: 9780080238487

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3. 001) These data suggest a particular role of magnesium m taste impairment of drinking water in The Netheriands. 11. 2). 004) was found between the taste rating and the type of material used for domestic plumbing. 12. As relatively few observations are available and subjects had to use prescribed qualifications for the taste and odour, the data obtained should only be considered as indicative. 12: Raw water source and qualification of the perceived water odour (O) (n = 98) and water taste (T) (n = 211) Raw water source % of total per water source category Qualification Chlorine-like Earthy Putrid Metallic Faint Τ 0 Τ 0 Τ 0 20 22 33 29 20 22 7 0 5 2 3 2 20 6 5 8 16 9 33 36 17 16 10 24 23 23 4 2 7 10 15 26 O Τ 0 Ground water Bankfiltrate Stored surface water 20 44 60 32 36 43 Total ( % of total) 51 39 Τ The odour and taste of drinking water derived from ground water which had an offensive or foul taste or smell mostly obtained the qualification "faint", while in the case of the waters derived from surface water the qualification "chlorine-like" was most frequently used.

3) showed that the items 3 and 4 scored high positive and the items 2 and 5 high negative. Apparently the subjects made a distinction between the good-neutral-bad-dimension and the offensivedimension. 6. Both solutions had a satisfactory fit although the 2-dimensional solution was slightly better. 6: Items used for taste description and corresponding scale values. 87 •Note that a higher scale value corresponds with a lower quality. 43 Panel members were also asked to describe on a separate sheet the quality of the perceived taste for two series of 8 tapwater samples during a session.

The subjects were tested for odour sensitivity as it was expected 35 that the presence of odorous organic micropoUutants in drinkmg water would be mainly responsible for impaired taste. 1. A fixed order was prescribed to ensure as much as possible comparable results, although the tests were carried out by 10 different instructors and under different local circumstances. 1: Order of presentation of duplo concentrations of aqueous solutions of isobomeol and o-dichlorobenzene. Isobomeol (;ig/l) o-Dichlorobenzene(^g/l) No.

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Sensory Assessment of Water Quality by B. C. J. Zoeteman

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