HIRANUMA APPLICATION DATAPLATING &ETCHING
SOLUTION

Data No.

Automatic Titrator

E4

Nov. 28,
2018

Quantitative determination of nickel chloride innickel plating solution

1. Abstract
The control and analysis of nickel plating solution are very important process for the product quality.
Analytical components of the general nickel plating solution are 1) nickel sulfate, 2) nickel chloride, and 3) boricacid. This report introduces an example of measurement for nickel chloride in nickel plating solution determinedby potentiometric titration with silver nitrate standard solution.

NiCl2+2AgNO3→Ni (NO3)2+2AgCl

2. Configuration of instruments and reagents(1) Configuration of instruments
Main unit: Hiranuma Automatic Titrator COM Series

Electrode: Silver combination electrode AGR-811Z (Double Junction Type)*The following electrodes are also usable.
・AGR-801Z (Silver reference combination electrode)・Combination of AG-311 (Silver indicator electrode) andMS-231Z (Silver reference electrode)・Combination of AG-311 and RE-241Z (Double junction type silver reference electrode)*Remark
The general reference electrode (RE-201Z) cannot be used for this titration because KCl
inner solution might come out to sample solution and it causes measurement error.
The inner electrodes of AGR-801Z and MS-231Z contain mercury (I) sulfate. When theseelectrodes are disposed, please ask the specialized industrial waste disposal operator.

(2) Reagents
Titrant: 0.05 mol/L Silver nitrate standard solution

Additive solution : 1 mL of 1 mol/L Nitric acid

3. Measurement procedure(1) Dispense 1 mL of sample into a 100 mL beaker with volumetric pipette.
(2) Add 60 mL of DI water.
(3) Add 1 mL of 1 mol/L nitric acid.
(4) Immerse electrode and titrate with 0.05 mol/L silver nitrate standard solution.

Some measurement would not be possible depending on optional configuration of system.

4. Measurement conditions and results
Examples of titration conditions
Cnd. No.
Method ﾞBuret No.
Amp No.
D.UnitS- Timer
C.P. mL
T.Timer
D.P. mLEnd Sens
Over mLMax Vol.

1Auto
1
3mV
5000300
0.2
20

sec
mL
sec
mL
mL
mL

Constant No.
SizeBlank
Morality
FactorKLUnitFormula

11 Mｌ
0 mL
0.05 mol/L0.9941
118.840g/L(D-B)*K*F*M/SDigits4Auto input parameter

Mode No.
Pre Int
Del K
Del Sens
Int TimeInt Sens
Brt SpeedPulse

805053240sec
mVsec
mV

None

Measurement results
Number ofSize

Titrant

Nickel chloride hexahydrate

Measurement(mL)

Volume (mL)Concentration (g/L)

1

1

0.528

3.119

2

1

0.528

3.119

3

1

0.527

3.113

Statistic
calculation

Avg.

3.12 g/L

SD

0.0034 g/L

RSD

0.11 %

Example of titration curve

5. Note(1) Quantitative determination method of total nickel
Quantitative determination method of total nickel in nickel plating solution can be performed by the following
procedure: add 60 mL of water to 1 mL of sample, add 20 mL of diluted ammonia solution and MX indicator,
and then it is determined by photometric titration with 0.1 mol/L EDTA standard solution. (Refer to application
data E10.)(2) Quantitative determination method of boric acid
Quantitative determination method of boric acid in nickel plating solution can be performed by the following
procedure: add 50 mL of water to 1 mL of sample, add 20 mL of 20 % mannitol solution, and then it isdetermined by potentiometric titration with 0.1 mol/L sodium hydroxide standard solution. (Refer toapplication data J8.)
Keywords：Nickel plating solution, Nickel chloride, Silver nitrate, Precipitation titration, Boric acidSome measurement would not be possible depending on optional configuration of system.