GB/T 26913-2011Bamboo charcoal (English PDF)

4.1 Classification

4.1.1 According to shape and size

According to different shapes and sizes, bamboo charcoal is divided into tube charcoal,

flake charcoal, broken charcoal, particle charcoal, and powder charcoal.

Specifications of particle charcoal are shown in Table 1.

4.2 Mark

Bamboo charcoals are marked by the difference of shape and size. Specific methods are

shown in Table 2.

5.1 Sense

Black, odorless.

5.2 Deviation of net content

Deviation of net content shall conform to Decree No.75 Measures for Metrological

Supervision of Quantitatively Packed Commodities issued by General Administration of

Quality Supervision, Inspection and Quarantine of the People's Republic of China.

6.1 Sense

PLACE bamboo charcoal sample on a piece of white paper. Under a bright environment,

DETERMINE it by visual and smell methods. For tube charcoal and flake charcoal,

6.2 Net Content

Executed according to the provisions of JJF 1070.

6.3 Determination of moisture content

6.3.1 Method summary

Test sample with certain mass is dried to constant weight at (105±5)°C. TAKE the

percentage OF mass-reduction amount TO the original test sample's mass as the

moisture content.

6.3.2 Instruments

6.3.4 Result calculation

Determination results of the moisture content of bamboo charcoal are calculated

according to formula (1).

6.4 Determination of ash content

6.4.1 Method summary

At (800±20)°C, test sample with a certain mass is burned to constant weight (WEIGH after

cooling). The percentage OF residue mass TO the original test sample's mass is the ash

content.

6.4.2 Instruments

6.4.3 Operating methods

PUT the porcelain crucible into the high temperature electric furnace. BURN to constant

weight at (800±20)°C. PLACE the crucible in a dryer for cooling to the room temperature

(about 30min). WEIGH it (accurate to 0.1mg).

6.4.4 Result calculation

Determination results of the ash content of bamboo charcoal are calculated according to

formula (2).

6.5 Determination of volatile matter content

6.5.1 Method summary

At the temperature of (850±20)°C, test sample with certain mass is heated for 7min with

isolation from the air. The percentage OF lost mass TO the original test sample's mass is

the volatile matter content.

6.5.2 Instruments

6.5.3 Operating methods

WEIGH 1g (accurate to 0.1mg) of test sample that has been crushed and gone through

0.315mm (55-mesh) sieve. PLACE in the porcelain crucible that has been burned to

constant weight at (850±20)°C.

6.5.4 Result calculation

Determination results of the ash content of bamboo charcoal are calculated according to

formula (3).

6.6 Determination of the fixed carbon content

6.6.1 Method summary

CALCULATE the fixed carbon content BY the mass of dried bamboo charcoal MINUS its

ash content and volatile matter content.

6.6.2 Instruments

6.6.2.1 High temperature electric furnace. With temperature control device,

thermocouple and high-temperature meter.

6.6.2.2 Porcelain crucible with cover. Volume of 30mL.

6.6.3 Operating methods

CRUSH the analysis test sample until all can go through the 0.315mm-sieve (55 meshes).

DRY to constant weight at the temperature of 102°C~105°C. The mass of the test sample

shall not be less than 30g, for the use of testing the ash content and volatile matters.

6.6.4 Result calculation

Determination results of the fixed carbon of bamboo charcoal are calculated according to

formula (4).

7.1 Lot-group rules and sampling method

7.1.1 Lot-group rule

The products - among which the raw material and production conditions are basically

consistent; and are manufactured on the same day or by the same shift - shall be deemed

as a batch. Sampling shall be conducted according to batch number.

7.1.2 Sampling method

7.2 Inspection

The product inspection is divided into ex-factory inspection and type inspection.

7.2.1 Ex-factory inspection

Ex-factory inspection shall be conducted for each batch of products. Ex-factory inspection

shall be performed by the quality inspection department of the manufacturer or entrusted

to third-party inspection agency. Inspection items are the sense, net content deviation,

and moisture.

7.2.2 Type inspection

Inspection items of type inspection include all items required in this Standard.

Type inspection shall be conducted, when there is one of the following conditions.

7.3 Decision rules

If one inspection result does not comply with the requirements defined in this Standard,

re-inspection shall be performed with double sampling. If the re-inspection result is still

unqualified, this batch of products shall be decided as unqualified.

8.1 Logo and label

Product logo shall include at least the following contents. product name and brand, type

specification, net content, executive standard, production date, quality level, manufacturer

name, production place, and factory address etc.

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