DIN EN 16058-2012 Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test .pdf

1、-XO7UDQVODWLRQE,16SUDFKHQGLHQVW(QJOLVKSULFHJURXS1RSDUWRIWKLVWUDQVODWLRQPDEHUHSURGXFHGZLWKRXWSULRUSHUPLVVLRQRI,1HXWVFKHV,QVWLWXWIU1RUPXQJH9%HUOLQ%HXWK9HUODJ*PE+%HUOLQ*HUPDQKDVWKHHFOXVLYHULJKWRIVDOHIRU*HUPDQ6WDQGDUGV ,11RUPHQ , analysis of nickel concentration in the stagnation water (see Clause 9). T

2、est lines shall not be emptied as a result of sampling. Water samples for the analysis of metals shall be acidified to a pH 2. Short term interruption (less than three days) of the flow regime due to maintenance or problems shall be permitted without invalidating the test. Water samples, however, sh

3、all not be taken within five days following restart. Any interruption in the test shall be reported in the test report (see Clause 11) together with a justification or explanation. 8.2 Test water sampling For the analysis of test water, samples shall be taken from the sampling point at the entry of

4、the test rig (see Annex A, Figure A.1. and Figure A.2) after flushing. 8.3 Sampling to determine metal release At weekly intervals, starting at the 3rdday of operation, water samples shall be taken in accordance with EN 15664-1:2008, from each test line after 4 h ( 5 min) stagnation time. DIN EN 160

5、58:2012-07 EN 16058:2012 (E) 9 During the sampling procedure the flow rate shall be (5 0,5) l/min (turbulent flow). 8.4 Sampling volumes For end point devices the volume of the representative water sample shall be the first (500 50) ml. For in-line devices the volume of the representative water samp

6、le shall be determined according to EN 15664-1:2008, 6.3. 9 Analysis Analyse the test water, contact water and control water using the measurement methods specified in EN 15664-1:2008, Table C.1. NOTE General guidance on analytical performance requirements such as detection limits and accuracy is co

7、ntained in ENV ISO 13530. 10 Expression of results 10.1 Nickel concentration calculation for end point devices For each individual test line (n) with end point devices, at every operating time (T), calculate the nickel concentration as follows: refnSCLnnVVTcTcTc,*)()()( =where )(*Tcnis the nickel co

8、ncentration per liter corrected by subtraction of blind value and normalized to a water sample volume of 1000 ml for line (n); )(Tcnis the nickel concentration in the water sample taken from the individual test line (n); )(TcCLis the nickel concentration in the water sample taken from the control li

9、ne CL; VS,nis the volume of the water sample in mL taken from test line n; Vrefis the reference volume of 1000 ml. For the condition: n: number of the test line (n=1, 2 , 3, 4 or 5) When )(TcCLis lower than the quantification limit of the analysis then: refnSnnVVTcTc,*)()( =. Any negative result sha

10、ll be reported as below quantification limit. DIN EN 16058:2012-07 EN 16058:2012 (E) 10 10.2 Nickel concentration calculation for in-line devices For each individual test line (n) with in-line devices, at every operating time (T), calculate the nickel concentration as follows: TSnSCLnnEPVVTcTcTc,*,)

11、()()( =where )(*,TcnEPis the equivalent pipe concentration corrected by subtraction of blind value for line (n); )(Tcnis the nickel concentration in the water sample taken from the individual test line (n); )(TcCLis the nickel concentration in the water sample taken from the control line CL; VS,n is

12、 the volume of the water sample taken from test line (n) in ml; VTSis the volume of the water in the test samples installed in the test line in ml. For the condition: n: number of the test line (n=1, 2 , 3, ) when )(TcCLis lower than the quantification limit of the analysis then TSnSnnEPVVTcTc,*,)()

13、( =. Any negative result shall be reported as below quantification limit. 10.3 Mean concentration after a given period of operation (T) Calculate the arithmetic mean and the standard deviation of the nickel concentrations of the different test lines. 10.4 Presentation of results The individual value

14、s shall be tabulated. For each test line, the nickel concentrations after 4h-stagnation according to 10.1 for end point devices or 10.2 for in-line devices shall be plotted over the period of operation (T) (see Annex B). DIN EN 16058:2012-07 EN 16058:2012 (E) 11 11 Test report The test report shall

15、contain: a) name and address of the test institute; b) name(s), function(s) and signature(s) or equivalent identification of person(s) authorising the test report; c) registration mark or number of the test report; d) name and address of the customer and/or producer of the tested material; e) name a

16、nd address of the manufacturer and the plating plant; f) number of this standard and year of its publication; g) description of products under test; 1) cross sectional and dimensional drawing of the tested products; 2) detailed description of the process and the parameters of the plating process; 3)

17、 production date and specific storing conditions; h) dates of starting and finishing rig testing; i) relevant testing conditions; 1) water source; 2) test water analysis during the testing period (see EN 15664-1:2008, Annex C); 3) graphs of the following test water parameters against the operating p

18、eriod, T, for the whole testing period: i) temperature; ii) conductivity; iii) alkalinity; iv) pH-value; v) oxygen; vi) TOC; 4) graph of room temperature against the operating period, T, for the whole testing period; j) description of any deviations from the specified procedure; k) specification of

19、the analytical devices used and their detection limits; l) test results according to Clause 10; m) date of report and signature. DIN EN 16058:2012-07 EN 16058:2012 (E) 12 Annex A (normative) Test rig components and assembly Test rig The test rig shall be set up as shown in Figure A.1 for in-line dev

20、ices and Figure A.2 for end point devices. Check valves shall be provided in order to prevent interferences between test and control lines and vice versa. The shut-off time of the outlet valves shall be in the range of 50 ms to 100 ms. For in-line devices the flow regulator shall be at the outlet of

21、 the test lines and for end point devices the flow regulator shall be at the inlet connection of the test line. Key 1 control line 2 3 test lines with 5 samples 3 alternatively: 5 test lines with 3 samples 4 test water inlet 5 filter 6 water meter 7 check valve 8 flow meter (optional ) 9 flow regula

22、tor 10 outlet valve 11 inlet test water sampling point Figure A.1 Schematic of test rig for testing in-line devices DIN EN 16058:2012-07 EN 16058:2012 (E) 13 Key 1 control line 2 outlet valve 3 test line with sample 4 test water inlet 5 filter 6 water meter 7 check valve 8 flow meter (optional ) 9 f

23、low regulator 11 inlet test water sampling point Figure A.2 Schematic of a test rig for testing end point devices DIN EN 16058:2012-07 EN 16058:2012 (E) 14 Annex B (informative) Example of graphs for expression of results Key 1 nickel concentration in g/l 2 operation time in weeks Figure B.1 Example

24、 of a run-time curve for the 4h stagnation samples DIN EN 16058:2012-07 EN 16058:2012 (E) 15 Key 1 concentration ( g/l) 2 operation period (weeks) Figure B.2 Example of a run-time curve for the 4h stagnation samples DIN EN 16058:2012-07 EN 16058:2012 (E) 16 Bibliography 1 EN 1484, Water analysis Gui

25、delines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) 2 EN 15664-2, Influence of metallic materials on water intended for human consumption Dynamic rig test for assessment of metal release Part 2 Test waters 3 EN 25813, Water quality Determination of dissolve

26、d oxygen Iodometric method (ISO 5813) 4 EN 25814, Water quality Determination of dissolved oxygen Electrotechnical probe method (ISO 5814) 5 EN 27888, Water quality Determination of electrical conductivity (ISO 7888) 6 EN ISO 6878, Water quality Determination of phosphorus Ammonium molybdate spectro

27、metric method (ISO 6878) 7 EN ISO 9963-1, Water quality Determination of alkalinity Part 1: Determination of total and composite alkalinity (ISO 9963-1) 8 EN ISO 10304-1, Water quality Determination of dissolved anions by liquid chromatography of ions Part 1: Determination of bromide, chloride, fluo

28、ride, nitrate, nitrite, phosphate and sulfate (ISO 10304-1) 9 EN ISO 11885, Water quality Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 11885) 10 EN ISO 14911, Water quality Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2

29、+, Sr2+and Ba2+using ion chromatography Method for water and waste water (ISO 14911) 11 EN ISO 15586, Water quality Determination of trace elements using atomic absorption spectrometry with graphite furnace (ISO 15586) 12 EN ISO 17294-2, Water quality Application of inductively coupled plasma mass s

30、pectrometry (ICP-MS) Part 2: Determination of 62 elements (ISO 17294-2) 13 ISO 6058, Water quality Determination of calcium content EDTA titrimetric method 14 ISO 6059, Water quality Determination of the sum of calcium and magnesium EDTA titrimetric method 15 ISO 9297, Water quality Determination of

31、 chloride Silver nitrate titration with chromate indicator (Mohrs method) 16 ISO 9964-3, Water quality Determination of sodium and potassium Part 3: Determination of sodium and potassium by flame emission spectrometry 17 ISO 10523, Water quality Determination of pH 18 Council Directive 98/83/EC on the quality of water intended for human consumption. Luxembourg, Office for Official Publications of the European Communities. 3 November 1998 DIN EN 16058:2012-07