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Description

This Standard Reference Material (SRM®) is intended primarily for use in validating analytical methods for the determination of catechins, xanthines, and toxic elements in solid oral dosage forms containing green tea and in similar matrices. NIST-3256 can also be used for quality assurance when assigning values to in-house control materials. A unit of NIST-3256 consists of five packets, each containing approximately 2.5 g of powdered material. Certified values /// Sample value(s) - please ask for current certificate.

Contents

Analyte	CAS Number	Concentration	Unit	Additional information
(+)-Catechin	[154-23-4]	2,63 ± 0,18	mg/g	dry-mass basis
()-Epicatechin	[490-46-0]	12,0 ± 2,6	mg/g	dry-mass basis
()-Epicatechin gallate	[1257-08-5]	17,1 ± 2,6	mg/g	dry-mass basis
()-Epigallocatechin	[970-74-1]	30,7 ± 5,7	mg/g	dry-mass basis
()-Epigallocatechin gallate	[989-51-5]	71,1 ± 6,6	mg/g	dry-mass basis
()-Gallocatechin	[3371-27-5]	7,55 ± 0,28	mg/g	dry-mass basis
Gallic acid	[149-91-7]	13,10 ± 0,49	mg/g	dry-mass basis
Caffeine	[58-08-2]	70,0 ± 2,6	mg/g	dry-mass basis
Theobromine	[83-67-0]	1,04 ± 0,15	mg/g	dry-mass basis
Arsenic (As)	[7440-38-2]	0,269 ± 0,019	mg/kg	dry-mass basis
Cadmium (Cd)	[7440-43-9]	0,025 ± 0,002	mg/kg	dry-mass basis
Lead (Pb)	[7439-92-1]	0,316 ± 0,030	mg/kg	dry-mass basis
Mercury (Hg)	[7439-97-6]	0,014 ± 0,002	mg/kg	dry-mass basis

Analyte

CAS Number

Concentration

Unit

Additional information

Method

(+)-Catechin

[154-23-4]

2,63 ± 0,18

mg/g

dry-mass basis

()-Epicatechin

[490-46-0]

12,0 ± 2,6

mg/g

dry-mass basis

()-Epicatechin gallate

[1257-08-5]

17,1 ± 2,6

mg/g

dry-mass basis

()-Epigallocatechin

[970-74-1]

30,7 ± 5,7

mg/g

dry-mass basis

()-Epigallocatechin gallate

[989-51-5]

71,1 ± 6,6

mg/g

dry-mass basis

()-Gallocatechin

[3371-27-5]

7,55 ± 0,28

mg/g

dry-mass basis

Gallic acid

[149-91-7]

13,10 ± 0,49

mg/g

dry-mass basis

Caffeine

[58-08-2]

70,0 ± 2,6

mg/g

dry-mass basis

Theobromine

[83-67-0]

1,04 ± 0,15

mg/g

dry-mass basis

Arsenic (As)

[7440-38-2]

0,269 ± 0,019

mg/kg

dry-mass basis

Cadmium (Cd)

[7440-43-9]

0,025 ± 0,002

mg/kg

dry-mass basis

Lead (Pb)

[7439-92-1]

0,316 ± 0,030

mg/kg

dry-mass basis

Mercury (Hg)

[7439-97-6]

0,014 ± 0,002

mg/kg

dry-mass basis

Miscellaneous

Certificate of Analysis (specimen)

Reference Material CoA specimen: for the current lot, please contact your customer service representative at info@labmix24.com

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Product data sheet

View all available product details e.g. description, analytes/parameters, CAS Number, concentrations/values, sales unit/product format, method, source, transport information

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NIST provides over 1300 Standard Reference Materials® as well as articles and practice guides describing the development, analysis and use of SRMs.

NIST Standard Reference Materials are used by analytical laboratories in industry, academia and government in order to facilitate commerce and trade and to advance research and development. The SRMs are produced by the engineering laboratory, the material measurement laboratory, and the physical measurement laboratory at NIST. They are available for chemical composition, physical properties, and engineering materials.

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Description

Contents

Miscellaneous

Certificate of Analysis (specimen)

Product data sheet