BS EN 15488-2007 pdf download.Ethanol as a blending component for petrol Determination of copper content Graphite furnace atomic absorption spectrometric method.
This BS EN 15488 specifies a procedure for the determination of copper content in ethanol from 0.07 mgfkg to 0.20 mglkg using graphite furnace atomic absorption spectrometry
NOTE FOr the purpose of this document, the terms % (rn/rn)’ and % (VA’ are used to represent the mass traction, respectively the volume fraction of a matenal
WARNING — Use of this standard may Involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.
2 Normative reference
The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 3170. Petroleum liquids — Manual sampling (iSO 3170:2004)
EN ISO 3696. Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
radiant power
rate at which energy is transported in a beam of radiant energy
3.2
transmittance
ratio of the radiant power transmitted by a material to the radiant power incident upon it
3.3
absorbance
logarithm to the base 10 of the reciprocal of the transmittance
NOTE Can be derived by the following equation
6.4 Polyethylene contaIners. 25 ml volume.
Rinse the containers with water (5.4),
6.5 Analytical balance, capacity of 100 g and capable of weighing to the nearest 0.01 g.
6.6 Ultrasonic bath
7 Samples and sampling
Unless otnerwse specified, laboiatuiy samples shall be obtained by the procedures described in EN ISO 3170. High density polyethylene containers shall be used. The containers should be carefully cleaned and rinsed with pure water to avoid contamination.
Samples should be analysed as soon as possible after removal from bulk supplies, to prevent loss of copper. NOTE High density polyethylene containers are used to prevent losses of copper by wall adsorption
8 Preparation of blank and calibration solutions
8.1 Intermediate calibration solution
Weigh a polyethylene container (6.4) and transfer with a micropipette (6.3) 100 .il of copper standard (53)
Add water (5.4) to the container to bring the mass up to approximately 10.0 g and re-weigh to the nearest
0.01 9.
Seal the container, mix well and mark with the copper content calculated as following.
8.2 Calibration solutions
The calibration solutions shall be prepared daily.
Weigh five polyethylene containers (6.4). add about 5 g ethanol (5.2) to each container and then respectively 20 jl, 40 p1, 60 p1, 80 p1 and 100 p1 of intermediate calibration solution (8.1). Reserve a sixth container for the preparation of the blank.
Add ethanol (5.2) to each of the six containers to bnng the mass up to approximately 10.0 g and re-weigh to the nearest 0.01 g.
Seal each container, mix well and mark with the copper content (including the blank) calculated as following:
EN 15488:2007 (E)
6.4 Polyethylene containers. 25 ml volume.
Rinse the containers with water (5.4).
6.5 Analytical balance, capacity of 100 g and capable of weighing to the nearest 0.01 g.
6.6 Ultrasonic bath
7 Samples and sampling
Unless otherwise specified. laboratory samples shall be obtained by the procedures described in EN ISO 3170. High density polyethylene containers shall be used. The containers should be carefully cleaned and rinsed with pure water to avoid contamination.
Samples should be analysed as soon as possible after removal from bulk supplies, to prevent loss of copper.
NOTE High dens4y polyethylene containers are used to prevent losses of copper by wall adsorption
8 Preparation of blank and calibration solutions
8.1 Intermediate calibration solution
Weigh a polyethylene container (6.4) and transfer with a micropipette (6.3) 100 il of copper standard (5.3).
Add water (5.4) to the container to bring the mass up to approximately 10.0 g and re-weigh to the nearest
0.01 g.
Seal the container, mix well and mark with the copper content calculated as following:
(2)
I’,
where
S is the copper content of the intermediate calibration solution in mg/kg:
V. is the volume of copper standard (5.3) in iii:
m, is the mass of water (5.4) in g
NOTE This procedure leads to intermediate calibration solution with nominal copper content corresponding to
10 mg.kg. The intermediate solution is stable for up to one week
8.2 Calibration solutions
The calibration solutions shall be prepared daily.
Weigh five polyethylene containers (6.4), add about 5 g ethanol (5.2) to each container and then respectively 20 p1, 40 p1, 60 p1, 80 p1 and 100 p1 of intermediate calibration solution (8.1). Reserve a sixth container for the preparation of the blank.
Add ethanol (5.2) to each of the six containers to bnng the mass up to approximately 10.0 9 and re-weigh to the nearest 0,01 g.
Seal each container, mix well and mark with the copper content (including the blank) calculated as following:BS EN 15488-2007 pdf download.