GB/T 12729.4-2020Spices and condiments - Determination of degree of fineness of grinding (hand sieving method) (English PDF)

Foreword

GB/T 12729 Spices and Condiments is constituted of the following parts:

---GB/T 12729.1 Spices and Condiments - Nomenclature;

---GB/T 12729.2 Spices and Condiments - Sampling;

---GB/T 12729.3 Spices and Condiments - Preparation of a Ground Sample for

Analysis;

---GB/T 12729.4 Spices and Condiments - Determination of Degree of Fineness

of Grinding (hand sieving method);

---GB/T 12729.5 Spices and Condiments - Determination of Extraneous Matter

Content;

---GB/T 12729.10 Spices and Condiments - Determination of Ethanol-soluble

Extract;

---GB/T 12729.11 Spices and Condiments - Determination of Cold Water-soluble

Extract;

---GB/T 12729.12 Spices and Condiments - Determination of Non-volatile Ether

Extract;

---GB/T 12729.13 Spices and Condiments - Determination of Filth.

This is Part 4 of GB/T 12729.

This Part was drafted in accordance with the rules in GB/T 1.1-2009.

This Part serves as a replacement of GB/T 12729.4-2008 Spices and Condiments -

Determination of Degree of Fineness of Grinding (hand sieving method). In comparison

with GB/T 12729.4-2008, other than editorial modifications, the main technical changes

are as follows:

---"3.3 Balance" is added (see 3.3);

---"accurate to 0.1 g" is modified into "accurate to +/- 0.1 g", so as to meet the

requirements for precision expression (see 5.1);

---Formula (1) is modified into a formula that complies with the requirements [see

1 Scope

This Part of GB/T 12729 specifies the hand sieving method for the determination of

degree of fineness of grinding of spices and condiments.

This Part is applicable to the determination of degree of fineness of grinding of spices

and condiments.

2 Normative References

The following documents are indispensable to the application of this document. In

terms of references with a specified date, only versions with a specified date are

applicable to this document. In terms of references without a specified date, the latest

version (including all the modifications) is applicable to this document.

GB/T 6003.1 Test Sieves - Technical Requirements and Testing - Part 1: Test Sieves

of Metal Wire Cloth (GB/T 6003.1-2012, ISO 3310-1:2000, MOD)

3 Instruments and Equipment

4 Operating Procedures