Determination of rate chloride (Cl-) with Argentometric Mohr on
Drinking Water Refill Tidiness in the Village Purwodadi Districts
Kras Regency Kediri
Diah Ayu Nur Rochmawati
1
and Mely Purnadianti
2
1
Department of Forensic Science, Postgraduate School, Universitas Airlangga, Jl. Airlangga no. 4-6, Surabaya, Indonesia
2
Departemen Hematologi-Klinik Fakultas Sains, Tehnologi dan Analisis Institut Ilmu Kesehatan Bhakti Wiyata Kediri,
Indonesia
Keywords: Argentometri, Chloride, Drinking Water Refill
Abstract: Water is a basic necessity in human life, water consists of mineral elements, one of which is chloride. If
chloride in water is too much, it can cause water quality degradation causing the water to be not suitable for
irrigation and human need. The aim of this study is to find out if the chloride content in drinking water refill
in Purwodadi-Kras Kediri village has met the requirement as per PERMENKES RI NO 492 / MENKES /
PER / IV / 2010 or not. The study uses quasi experiment design method, the sample was collected through
non-random sampling technique. The samples are analyzed by using argentometric mohr method with
standard solution of AgNO
3
and indicator K
2
CrO
4
, end point marked by the formation of Ag
2
CrO
4
red
brick. The results of this study show that chloride content (Cl
-
) contained in drinking water refill packing in
the village of Purwodadi Kras-Kediri was to 7.32 Mg/L. This study concludes that the chloride content in
drinking water refills in the village Purwodadi-Kras Kediri has met the requirements of PERMENKES RI
NO 492 / MENKES / PER / IV / 2010, which is more than 250 mg/L.
1 INTRODUCTION
Water is basic needs of human life and its function
cannot be replaced by another compound (F. G.
Winarno 1986). Drinking water is not only the
problems related to available or failure water but
also the quality of waters available. The indications
of clean drinking water are colourless, odourless,
tasteless (salted, acid), not contains a chemical that
endangers, does not contain are bacterium causing a
disease and forth (T. Gilarso, 2004). In a body of
water useful as soluble substance food substance,
digest food, and regulating body temperature. The
human body is composed of 60-70 % water, under
normal circumstances the human body need 2.5
litres of water every day. Water consisting of non-
metallic minerals required by man for development
or physical growth man, several chemical elements
that are contained in water covering Ca, Mg, Cl, Fe
and so on.
Water also has a role so long, including as a
means of transport digestion food to the network, as
transport leftovers to terminal as shelter kidneys and
out as urine, as a supplement hormone be produced
by the enzyme. bearing heat its surface of the skin
out as sweat (Hertog Nursanyoto, 1992).
Those compounds subjected to the process of
dissociation in water so as to form ions. The ion also
cannot be oxidized under normal circumstances and
not in nature are toxic, but if excess salt chloride can
result in a decrease in the quality of water so that the
water unfit for irrigation and to meet domestic life
(Achmad Rukaesih, 2004).
The village of purwodadi districts Kras regency
Kediri, for packaged drinking water are very popular
among all these the village community, since their
prices relative affordable and then be used as an
alternative form of drinking water for some of the
residents without regard to the quality of water what
is happening to them. Becomes one of the
requirements standart drinking water would have to
fulfill standart physics, bacteriology, as well as
standart chemical, one of which is the womb
chloride (Cl
-
) that does not be sold more than 250
mg/l. those conditions are in accordance with
462
Rochmawati, D. and Purnadianti, M.
Determination of rate chloride (Cl-) with Argentometric Mohr on Drinking Water Refill Tidiness in the Village Purwodadi Districts Kras Regency Kediri.
DOI: 10.5220/0007545004620464
In Proceedings of the 2nd International Conference Postgraduate School (ICPS 2018), pages 462-464
ISBN: 978-989-758-348-3
Copyright
c
2018 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved
Permenkes RI No. 492 / MENKES / PER / IV /
2010.
2 SUBJECTS AND METHODS
In this study the required sample is 3 (three)
samples. The sample used is drinking Water
Tidiness of Refill the Village Purwodadi Districts
Kras Regency Kediri.
2.1 Experiment Design
This research included in experimental research,
design of this research is cross sectional.
The tools used:
▪ Erlenmeyer 250 ml
▪ Pipette 100 ml
▪ Micro burette 25 ml
▪ Macro burette 50 ml
▪ Measuring cup 100 ml
▪ Volumetric flask 100 ml, 250 ml (SNI 01-3554-
2006).
Material used :
▪ Refill drinking water in the village
▪ Potassium chromate indicator K
2
CrO
4
5%
▪ Standard silver nitrate solution (AgNO
3
) 0,01 N
▪ Standard sodium chloride solution NaCl 0,01 N
▪ Solution of sodium hydroxide NaOH 1 N
▪ Sulfuric acid solution H
2
SO
4
1N (SNI 01-3554-
2006)
The research was conducted in a chemical
analysis of food and drink an academy health analyst
IIK bhakti wiyata Kediri.
2.2 Method of collecting data
▪ A method the sample collection by taking of
each place 1500 ml and placed on the receptacle
clean
▪ After a sample was taken in accordance with the
provisions 100 ml procedure
Qualitative Analysis of Cl
-
:
▪ Test AgNO
3
▪ Taken 3 drops of sample solution into a test tube
▪ Plus the solution of argentum nitrate (AgNO
3
)
will occur white deposits
▪ The precipitate dissolves in a dilute solution of
ammonium hydroxide (NH
4
OH), and with the
addition of dilute nitric acid (HNO
3
) solution a
white precipitate will occur again (Bassett,
2005).
Quantitative Analysis using titration
Argentometry method Mohr :
1. Standardization of AgNO with NaCl
▪ Measure carefully 25 ml of 0.01 N NaCl into 250
ml Erlenmeyer
▪ Add 1 ml of 5% K
2
CrO
4
indicator 2-3 drops into
Erlenmeyer which contains 0.01 N NaCl until it
becomes reddish yellow.
2. Determination of Chloride Level
▪ Measure carefully 100 ml in pH 7-10, if it is not
within the pH range, add H
2
SO
4
1N or 1N NaOH
to pH 7-10.
▪ Add 1 ml of 5% K
2
CrO
4
indicator
▪ Titrate with 0.01N silver nitrate (AgNO
3
)
standard solution to form a reddish yellow color.
▪ Perform blank titration by measuring carefully
100 ml of distilled water and then working with
the treatment
▪ Do duplo work
▪ Calculate chloride content (Cl
-
) with SNI 01-
3554-2006
Calculation Standard
2.3 Statistical analysis
The data is subjected to statistical analysis using the
statistical descriptive. Statistic descriptive is used to
calculate the average volume of NaCl and AgNO
3
.
3 RESULTS
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Publishers, it is necessary that Authors provide
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Author’s authorization to publish the Contribution.
Table 1: Qualitative Test
No
Test
Literature
Observation
Res
ult
1
AgNO
3
White sediment
White
sediment
+
2
NH
4
OH
White
sediment
disappear
White
sediment
disappear
+
3
HNO
3
White
sediment
formed again
White
sediment is
formed again
+
Determination of rate chloride (Cl-) with Argentometric Mohr on Drinking Water Refill Tidiness in the Village Purwodadi Districts Kras
Regency Kediri
463
Table 2: Result of determing Cl
-
No
Sample
Volume (mL)
Volume
AgNO
3
(mL)
Average
Volume
(mL)
1
100,0
6,240
2
100,0
6,240
3
100,0
6,240
6,244
4
100,0
6,240
5
100,0
6,240
4 DISCUSSION
Drinking water is safe for health when it meets the
physical, microbiological, chemical and radioactive
requirements contained in mandatory parameters and
additional parameters set out in PERMENKES RI
NO. 492 / MENKES / PER / IV / 2010 concerning
drinking water requirements and supervision that
clean drinking water not based on clarity alone but
rather the normal limit of the compound or mineral
elements contained therein. (RI 2010). Chloride in
the form of ions is one of the many inorganic anions
present in water and waste (Pudjianto 1984). In the
urine body also contains chloride salt is ± 1% while
well water contains high chloride content, it means
that the well water has been contaminated by the
urine (Surbakty 1987). A qualitative analysis is to
know that the chloride in sample water. It uses the
following mechanism :
▪ Test AgNO
3
While quantitative analysis in determining levels
of chloride on drinking water refills uses the
argentometri mohr. It uses aregntometri mohr in the
analysis, because argentometri mohr functions to
determine bromide levels and chloride.
a. Test K
2
CrO
4
b. Test BaCO
3
The principle of the application of chloride levels
uses the method argentometry mohr is in solution
neutral or slightly alkaline, silver ions with an ion
klorisa react in a quantitative manner. Titration ends
with establishment of silver chromatic that is
coloured red of silver chromate of this can be
explained clearly to the reaction, as it follows:
-
-
At the beginning of titration happened precipitate
silver chloride and after reached point equivalence,
so the addition of a little silver nitrate will react with
chromate , by forming precipitate silver chromate
that is colored red.
5 CONCLUSIONS
Based on the results of inspection of drinking water
refill packaging contained in the village Purwodadi
Kediri Argentometri Mohr method obtained results
7.32 mg/L. from the data it is concluded that
chloride content at drinking water refill packing
circulating in purwodadi village of Kediri still fulfill
the requirement from PERMENKES RI NO
492/MENKES/PER/IV/2010 that can not be more
than 250 mg/L.
6 RECOMMENDATION
▪ Need to pay attention to factors that may affect
the titration result.
▪ For producers pay more attention to the quality
of drinking water refill packs that are produced
before being distributed in the community.
▪ For people to be more careful in choosing
drinking water for daily consumption.
REFERENCES
Achmad Rukaesih. 2004. Kimia Lingkungan. Yogyakarta:
Andi.
Bassett. 2005. Teks Analisis Anorganik Kualitatif Makro
Dan Semi Mikro. Jakarta: PT. Kalman Media Pustaka.
F. G. Winarno. 1986. Air Untuk Industri Pangan. Jakarta:
PT. Gramedia.
Hertog Nursanyoto. 1992. Ilmu Gizi: Zat Gizi Utama.
Jakarta: Golden Terayon.
Pudjianto, E. W. 1984. Analisa Kualitas Air :
Pengendalian Dan Pemeriksaan Sampel Air. Surabaya:
Bina Indra Karya.
RI, Menteri Kesehatan. 2010. Persyaratan Kualitas Air
Minum, KEPMENKES RI Nomor
494/MENKES/IV/2010. Jakarta: MENKES RI.
Surbakty, BM. 1987. Teknologi Terapan Air Minum
Sehat. Surakarta: Mutiara Solo.
T. Gilarso. 2004. Pengantar Ilmu Ekonomi Makro.
Yogyakarta: Kanisius (Anggota IKAPI).
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