Multi-element Standard Solution

Lot N: R45552 Ref N.: EE92.4.W.L5

Composition: F- 2mg/l; Cl- 4mg/l; NO2

- 2mg/l; NO3

- 4mg/l; SO4

2- 4mg/l; PO4

3- 2mg/l; Matrix: H2O

ElementCertified Value and

uncertainty(mg/l)*

Starting MaterialPurity

LOT Number Starting Solution Traceability

F- 1.987 ± 0.006 NaF 99.999% 1/[1] : F-[NaF] : H2O : T- : 5 : H03-02 NIST SRM 3183Lot N 991510

Cl- 3.995 ± 0.013 KCl 99.999% 1/[1] : Cl-[KCl] : H2O : T- : 5 : H05-02 NIST SRM 3182Lot N 990506

NO2

- 1.996 ± 0.006 NaNO2 99.999% 1/[1] : NO2-[NaNO2] : H2O : T- : 5 :

H06-04CRM 27033Lot N RTA45

NO3

- 4.006 ± 0.013 KNO3 99.999% 1/[1] : NO3-[KNO3] : H2O : T- : 5 :

H03-03NIST SRM 3185Lot N 991508

SO4

2- 3.973 ± 0.013 Na2SO

4 99.999% 1/[1] : SO42-[Na2SO4] : H2O : T- : 5 :

H04-02NIST SRM 3181Lot N 000630

PO4

3- 2.015 ± 0.006 KH2PO

4 99.999% 1/[1] : PO43-[KH2PO4] : H2O : T- : 5 :

H02-03NIST SRM 3139aLot N 890607

*the certified value is based on both gravimetric preparation, and instrumental analysis * the uncertainty is calculated as: U=ku

c,

where k is the multiplier for a 95% level of confidence interval (Table B.1 of Guidelines for Evaluating and

Expressing the uncertainty of NIST measurement results), and uc is the combinated standard uncertainty calculated acc. ISO Guide to the Expression of

Uncertainty in Measurement

Measured density: 0.997 g/cm3 at 20 0C

This solution was manufactured using purified acids by subboiling, 18 MOhm double deionized water, calibrated Class A glassware, and high density polyethilene bottle, decontaminated by leaching with high purity acids, 18 megohm deionised water and triple rinse. Balances are calibrated with weights, traceable to NIST. Stability and accuracy are guaranteed until the date shown at the label provided that the solution is tightly capped and stored under normal laboratory conditions.This certification is nullified if the standard solution is damaged, contaminated, or modified.

Certification date:Shelf Life* :Expiry date** :

14.07.2009until 08.2010………………(Should not exceed 6 months from date of opening within the shelf-life period.)

* The shelf life is the specified length of time prior to use for which a properly packaged and stored standard solution remains within the specified uncertainty.

** The expiry date is the date after which the certification of standard solution becomes invalid (due to transpiration losses and frequently use).

1/1ACN CHEMICALS UK Ltd. - Second Floor, 27 Gloucester Place, London, W1U 8HU, United Kingdom

Tel: +44 (0) 207 193 9114 - Fax:+44 (0) 208 950 1603 – Email: contact@spectracer.co.uk – Web: www. spectracer.co.uk