**Quality Inspection Office Memorandum (2006) No. 51**
To the Provinces, Autonomous Regions, Directly Administered Municipalities, Cities with Separate Planning Status, the Grain Production Bureau of the Xinjiang Production and Construction Corps, and China National Grain Reserves Corporation:
In order to ensure the effective implementation of the National Minimum Grain Purchase Price Plan and improve the accuracy and consistency of grain purchase inspection results, we are issuing this memorandum to highlight key considerations when applying national standards for wheat and rice procurement inspections.
**I. Key Issues in Wheat Procurement Inspections**
1. **Determination of Wheat Quality**
The quality of wheat is assessed according to the national standard GB/T 5493, "Inspection Methods for Grains and Oils – Type and Mixing Tests." During testing, the wheat kernels should be cut crosswise to ensure a clean, even section. The glass-like transparent or semi-transparent part of the kernel is considered the hard endosperm. If this hard portion exceeds half of the kernel, it is classified as a "hard kernel" or "angular plasmid." The rate of such kernels among 100 grains is referred to as the "keratinocyte rate." According to the national standard GB 1351-1999, durum wheat with a keratinocyte rate exceeding 70% is categorized as hard wheat.
2. **Black Wheat Germ Test**
Under GB 1351-1999, black embryos are classified as diseased grains. These are grains that show lesions on the surface, which may damage the embryo or endosperm. When assessing for black embryos, the grain should be cut from the middle of the lesion to check if the embryo or endosperm is affected. Dark brown or black spots on the surface that do not penetrate the embryo or endosperm should not be considered black embryos.
3. **Sprout Detection in Wheat**
According to GB 1351-1999, sprouted grains are those where the bud or young root has not broken through the seed coat, or where the germination has not fully emerged. Germinated grains are identified by an embryo that has ruptured or bulged the seed coat, causing separation from the rest of the kernel.
**II. Important Considerations in Rice Quality Inspections**
Appendix A of the "Rice" National Standard (GB 1350-1999) does not specify moisture content requirements for whole milled rice tests. However, in practice, the moisture level significantly affects the results of whole polished rice rate tests. To ensure standardized testing, the moisture content of rice samples used for whole rice rate determination should be maintained between 12.5% and 14.5% during procurement.
**III. Strengthening Implementation of Standards to Ensure Smooth Pre-Plan Acquisition**
Provinces implementing the minimum purchase price plan must enhance public awareness of national grain quality standards, conduct timely quality assessments, and monitor current grain conditions to guide procurement and inspection activities. It is essential to enforce certified employment for inspection personnel and organize training sessions, inter-laboratory comparisons, and centralized inspections to unify testing criteria and improve result consistency. Each procurement network should display physical grade samples and strictly adhere to national standards during inspections.
**National Grain Administration Standard Quality Management Office**
June 2nd, 2006
Ceramic Bathroom Accessory Sets
Ceramic Bathroom Accessory Sets,Blue Bathing Set Ceramic Bottle,Brown Bathing Set Ceramic Bottle,Green Bathing Set Ceramic Bottle
MingHui Houseware Company Limited , https://www.minghuihousewareltd.com