Spinach | Food matrix standard | Reference Materials

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Spinach View Certificate

This product can be used as a working standard for daily analysis and testing; It can also be used for laboratory quality control such as test method evaluation and instrument calibration.

1、Traceability and value determination method

The standard value is verified by . The traceability of the product quantity value is ensured through the use of production, measurement methods and measuring instruments that meet the requirements of metrological characteristics.

2、Characteristic value and expanded uncertainty

No	Analyte	CAS	Standard value	Uncertainty(k=2)	Matrix
1	Al	7429-90-5	0.134	0.039	Spinach
2	Ca	7440-70-2	0.90	0.06
3	K	7440-09-7	4.93	0.51
4	Mg	7439-95-4	1.01	0.11
5	Nitrogen	7727-37-9	4.58	0.56
6	Na	7440-23-5	2.43	0.41
7	P	7723-14-0	0.57	0.04
8	S	7704-34-9	0.42	0.03
9	Si	7440-21-3	(0.593)(represents information value)	/
10	Ag	7440-22-4	0.015	0.006
11	As	7440-38-2	0.35	0.05
12	B	7440-42-8	31.5	3.4
13	Ba	7440-39-3	12	3
14	Be	7440-41-7	(0.03)(represents information value)	/
15	Br	7726-95-6	(17.6)(represents information value)	/
16	Cd	7440-43-9	0.52	0.15
17	Ce	7440-45-1	1.3	0.4
18	Co	7440-48-4	0.5	0.1
19	Cr	7440-47-3	21	4
20	Cs	7440-46-2	0.25	0.04
21	Cu	7440-50-8	11.3	1.1
22	Dy	7429-91-6	0.07	0.03
23	Er	7440-52-0	0.034	0.006
24	Eu	7440-53-1	0.022	0.005
25	Fe	7439-89-6	704	76
26	Gd	7440-54-2	0.10	0.04
27	Ge	7440-56-4	0.020	0.008
28	Hg	7439-97-6	0.013	0.004
29	Ho	7440-60-0	0.013	0.005
30	I	7553-56-2	(0.68)(represents information value)	/
31	La	7439-91-0	0.73	0.11
32	Li	7439-93-2	3.2	1.0
33	Mn	7439-96-5	53	4
34	Mo	7439-98-7	0.96	0.21
35	Nd	7440-00-8	0.58	0.16
36	Ni	7440-02-0	6.7	0.6
37	Pb	7439-92-1	0.54	0.12
38	Pr	7440-10-0	0.15	0.04
39	Rb	7440-17-7	52	3
40	Sb	7440-36-0	0.03	0.01
41	Sc	7440-20-2	0.21	0.07
42	Se	7782-49-2	0.058	0.025
43	Sm	7440-19-9	0.117	0.012
44	Sn	7440-31-5	0.063	0.011
45	Sr	7440-24-6	75	8
46	Tb	7440-27-9	0.014	0.005
47	Th	7440-29-1	0.18	0.04
48	Ti	7440-32-6	54	23
49	U	7440-61-1	0.04	0.01
50	V	7440-62-2	1.5	0.4
51	Y	7440-65-5	0.68	0.25
52	Yb	7440-64-4	0.03	0.01
53	Zn	7440-66-6	61	6
54	Bi	7440-69-9	9.3	1.3
55	Lu	7439-94-3	4.2	0.8
56	Tl	7440-28-0	89	10
57	Tm	7440-30-4	4.8	1.1
58	Cl	7782-50-5	(1.244)(represents information value)	/
59	F	7782-41-4	(9)(represents information value)	/

3、Uniformity test and stability investigation

According to ISO 33405 metrology technical specification, the samples are randomly sampled after packaging, and the uniformity test and long-term stability tracking of the product are carried out by . The results show that the uniformity meets the F test rules and has good stability.

The quantitative value of this product is valid for 192 months from the date of value determination. The research and development unit will continue to track and monitor the stability of the product. If the value changes during the validity period, the user will be notified in time.

4、Packaging storage and use

Packaging: This product is packaged in High-density plastic bottle, with the specification of 20g. It should be protected from breaking when carried or transported.

Storage: Room temperature and in the sealed and light-proof conditions. Before use, it should be （20±3）℃℃ fully shaken to ensure homogeneity. This product should be used as soon as possible after being opened. During the use process, strict precautions should be taken to prevent contamination.

Form	Solid State
Stroma	Spinach
Packing	High-density plastic bottle
Save conditions	Refrigeration(4±4）℃ Store airtight and away from light place.Before use, the temperature should be adjusted to Room temperature，shake uniformity.Used up after opening,prevent contamination during use.