Pribolab - STD#7050-1100µg/mL交链孢酚(Alternariol)/甲醇-25855

1. General information

This document is designed and the certified value(s) and uncertainty(ies) are determined in accordance with ISO Guide 31^[1].

2.1 Intended use of the RM

- for laboratory use only

- calibration of analytical instruments。^[2]

2.2 Instruction for the correct use of the RM  

The compound should be stored at 2-8℃ in a dark place. Before usage of the RM , the compound should be allowed to warm to temperature(20±3℃). The recommended minimum sub - sample amount for all kinds of application is 100 μL. The expiry date of this RM is based on the current knowledge and holds only for proper storage conditions in the originally closed flasks/ packages.

2.3 Hazardous situation

The normal laboratory safety precautions should be observed when working with this RM.Further details for the handing of this RM are available as safety data sheet.

Hazardous Ingredients     Concentration in%     Pictograms     Signal word     Hazard statement(s)

Methanol                        >99.9                                           Danger         H225,H301,H311,H331,H370

3. Certified values and their uncertainties

3.1 Calculation of uncertainty

The uncertainty of the calibrant solution was calculated on the basis of preparation ^[4].

a   Maximum tolerance of purity was divided by

b Calculation of this u-value is based upon the uncertainty formula for the weighed amount as given in the calibration report from annual balance calibration

c  A triangular distribution(division by )was chosen for the calculation of u(cal)

d  Based on a series of ten fill and weigh experiments on a typical 100mL flask; the value was used directly as a standard deviation  

e  Based on the density of 0.7918 g/cm³ at temperature T=20℃ and a maximum  temperature variation of ±3℃,of volume expansion, relative volume expansion  coefficient of Methanol  is 1190*10^-6/℃[5],volume expansion term(rectangular distribution)was divided by

f   The three contributions are combined to give the u(V)=

Calculation of the combined uncertainty u _c and the expanded standard uncertainty U

4.Discussion of traceability

This calibrant is certified on the basis of gravimetric preparation^[4]. Thus the certified value(mass concentration of Alternariol is based on the weighed amount of the starting material and is therefore traceable to the stated purity of the solid raw material.High purity material represents a practical realization of concentration units,through conversion of mass to molar quality.

5. Confirmation of certified value by HPLC-FLD

The certified concentration of Alternariol of the gravimetric prepared solution was confirmed by HPLC-FLD against an independently prepared reference batch of unlabeled Alternariol .

6.Further information

The purchaser must determine the suitability of this product for its particular use. Pribolab makes no warranty of any kind, express or implied, other than its products meet all quality control standards set by Pribolab. We do not guarantee that the product can be used for a special application.  

Inspected by

Quality System Specialist