QB/T 2951-2008Inspecting Rules for Detergent Products (English PDF)

4.1 Type inspection

The type inspection items include all the technical requirements specified by the

product standard (if the material requirement items are known, the inspection of its

property index, under the normal production and usage process, can be ignored); the

type inspection shall be performed under the following circumstances.

a) Under formal production, when the raw materials, formula, process, management

(including the personnel quality) change greatly, or when the equipment

transformation may affect the product quality;

b) Under normal production, the type inspection shall be performed regularly;

c) When restore the production after long-term shutdown;

d) When there is big difference between the leave factory inspection results and the

previous type inspection results;

e) When the national industry management department and quality supervision

agency propose to perform the type inspection.

4.2 Leave factory inspection

The leave factory inspection items include net content, package appearance

requirements, sensory indicator, physical and chemical indicator (perform as per the

product standard specific provisions).

4.3 Supervision inspection

During the supervision inspection, the items specified in the product standard are not

necessarily fully inspected; key inspection can be performed against the items that are

involved in the safety, health, environmental protection, as well as product important

properties, physical and chemical indicators of product, etc. If necessary, prepare the

implementation scheme of the supervision inspection, but in principle it shall be

obtained the consent of this technical committee of the standardization.

6.2.2 When performing the type inspection, the health indicator inspection items can

be inspected as per the product standard through randomly sampling 3-unit products

from any batch of products.

6.3 Supervision inspection

The supervision inspection items shall, according to the product quality supervision

requirements, be determined by the task organization.

6.3.1 Inspection lot

The product of the inspection lot indicates the manufacturer self-inspected qualified

products, or the commodity in the sales filed, and meet the requirements for product

quality guarantee period or limited use date.

The confirmation of inspection lot amount.

a) When sampling on the production or package site, certain amount of products that

is from the same batch amount of products produced under the same production

condition by the manufacturers;

b) When sampling on the warehouse of manufacturer, wholesaler, retailer, and

retailing site, one batch indicates the same batch of products or entire

commodities existing n the sampling site.

6.3.2 Sampling implementation

The sampling shall be finished by the professional personnel sent by the inspection

task entrusting organization or designated inspection agency and held sampling notice

on the designated place and within the specified time.

When the sampling personnel implementing the sampling on the manufacturer, he/she

shall be accompanied by the enterprise representatives.

The sample size shall be determined according to inspection lot size and as per the

provisions of Table 1; apply the random sampling method (Appendix A) to randomly

sample the sample unit of cabinet (box).

Randomly sampling 2 sample units from each sample cabinet (box), so that the total

weight of inspection sample shall be no less than 6kg. When 2 sample units are not

enough, appropriately increase the amount of sampling; if it is too many, concentrate,

and perform secondary random sampling, but is shall be no less than 3 sample units;

thereof, one sample unit shall not participate in the inspection, only serve as

identification of product authenticity.

The sample shall be tightly packed, prevent damage, affix seals, prevent unpacking;

indicate the sampling organization, sampling personnel, sampling time; and send to

Appendix A

(Normative)

Random Sampling Method

The product shall be inspected by the sampling method, randomly extracting the

samples according to the inspection lot's different sampling sites and lot amount; it can

be divided into three methods like equidistant sampling, stratified sampling and simple

sampling.

A.1 Equidistant sampling

It is applicable to sampling on the production line of the manufacturer or commodity

packaging site.

Extract a sample unit as per the product quantity per certain unit or at certain time

interval till the sample amount is enough. The sampling interval equals to the batch

amount or time required by producing batch of products divided by the sample amount.

A.2 Stratified sampling

It is applicable to sampling on the warehouse of manufacturer, wholesaler and retailer.

For the inspection lot of N unit products stacked into k layers, according to the amount

of unit product in each layer, dispatch the confirmed sample amount n to each layer in

proportion; each layer contains n1 sample units. namely n1=n/k; ensure the n1 is the

integer greater than 1; and each layer shall have at least one sample unit extracted

(namely, n >= k).

Then randomly sampling from each layer independently according to the given number

of sample units of n (generally it is simple sampling).

A.3 Simple sampling

It is applicable to the sampling on the commodity retailing site.

Randomly sampling n samples as the inspection sample from the inspection lot

containing N unit products; the possibi...

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