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SAM-204

Cera
Muestreo

Cera
Definición

(lista de códigos SA cubiertos por esta ficha)		 Productos céreos que sean pastas muy viscosas o sólidos, como la vaselina, la cera de parafina, la cera de petróleo microcristalina, la cera de abeja o el betún.

Pasty products such as casein, gelatin and dextrins are also covered in this card.

Waxy products in the form of (fine) powder, see specific card ‘Chemicals, solid’.

Liquid waxes, see specific cards ‘Petroleum liquids’ and ‘Chemicals, liquids’.

For products in retail sale packages see specific card ‘Retail packages and finished articles’.


Cera
Cantidad mínima recomendada por cada muestra 0,25 kg
Normas aplicables (ISO y normas de la UE) y legislación relevante

 Consulte asimismo la legislación y las directrices nacionales relativas a la toma de muestras.

Equipo necesario
La herramienta de muestreo recomendada dependerá del método de muestreo que se utilice
  • Tomamuestras con tubo de pistón (L05-01)
  • Tomamuestras en espiral (S04-01)
  • Tomamuestras perforador (E02-01)
  • General tools: knife, (metal) spatula
  • Sampling scoop (L04-01)
  • Sampler for frozen goods (E01-01)
  • Pipeline sampler (L06-01)
Contenedores que vayan a emplearse para la toma de muestras
  • Envases de metal (M01)
  • Botellas de vidrio (G01)
  • Botellas de plástico (P03 o P04)
Precauciones de seguridad y evaluación del riesgo Consulte la legislación y las directrices nacionales sobre salud y seguridad. See SDS if available.

  • Wear protective gloves and safety glasses.
  • En condiciones normales de uso, la cera no representa un peligro especial para la salud, excepto cuando se calienta. Las ceras que se mantienen sólidas a temperaturas ambiente pueden ser transportadas a temperaturas más altas (tenga cuidado con las temperaturas de 50–70 °C) para facilitar la carga o descarga desde las cisternas. There is a risk of skin burns and eye damage if boiling spray comes into contact with the mucous membranes or the eyes.
  • If splashed with hot product, wash immediately with abundant cold water to relieve the burning and obtain medical assistance immediately.
  • No intente retirar el producto caliente de la piel ni retirar las prendas que se hayan quedado atrapadas en la piel junto con el producto.
  • Material inflamable de bajo riesgo El producto puede formar mezclas inflamables y quemarse solamente si se calienta por encima de su punto de inflamación. Sin embargo, la presencia de cantidades pequeñas de hidrocarburos más volátiles puede aumentar este riesgo.
For more information see chapter Health and Safety.


Plan de muestreo
Tipo de envío Procedimiento
Consignment for customs clearance The aggregate sample consists of an appropriate number of incremental samples. When you are satisfied the consignment is homogeneous, one incremental sample is usually taken as representing the goods covered by the same customs declaration.

Asegúrese de que el producto del que se tome la muestra no se vea alterado por el proceso de muestreo. NO vuelva a calentar las muestras, ya que podría afectar a sus propiedades y provocar la pérdida de elementos volátiles o un cambio físico o químico debido al sobrecalentamiento.

Bulk products - loose in tank, tanker truck, reservoir wagon, drums, tank cars — heated Form one aggregate sample from three or more incremental samples, taken from at least three heights: approximately 15 % from the bottom, half-way up and approximately 15 % from the top surface of the product in each lot. Check the homogeneity of the lot — if the homogeneity is in doubt, take more incremental samples.

Where the product is heated above 40 degrees, consider whether the consignment should be treated as dangerous goods and the sampling to be carried out by specially trained officers or a contractor. You should only proceed if you are satisfied that you have appropriate PPE and sampling equipment and can carry out the sampling safely.

Warning: do not allow the product to cool in the tank or drums because it may be extremely difficult do remove the product if it solidifies.

Bulk products - loose in tank, tank truck, reservoir wagon, drums, tank cars — not heated (ambient temperature) Take one aggregate sample. If the product is in the form of a creamy paste or hard paste, take a number of incremental samples, dependent on the homogeneity in each lot. Check the homogeneity of the lot — if the homogeneity is in doubt, take more incremental samples. Different products or lots have to be sampled separately.

  • Products in highly viscous liquid state: before sampling, draw off an appropriate quantity of product, to prime the sampling circuit and valve. If the container has been unused for a long time, it is good practice to re-circulate the product before taking samples.

  • Products in solid state: do not heat the product and use a hand drill sampler (E02-01) or a sampler for frozen goods (E01-01).

  • Products in the form of a creamy paste: do not heat the product and use a spiral sampler (S04-01) or sampling scoop (L04-01) to take several samples at various positions and depths in the mass, to ensure that the sample is as representative as possible. After taking the samples from the mass, prepare the composite sample in a metal bucket by mixing vigorously with the metal spatula and transfer the samples in appropriate containers.

    • If the product is in the form of a hard paste, use a spiral sampler S04-01 to take several samples at various positions and depths in the mass, to ensure that the sample is as representative as possible. After taking the samples from the mass, prepare the composite sample in an appropriate bucket by breaking up and mixing the cores of product with the metal spatula and transfer the samples in appropriate containers.
Barrels, crates, small containers — heated/not heated Take one aggregate sample. Equal quantities of incremental samples are taken from different transport containers found at different positions in the transport vehicle or in the storage facility by random selection or systematically. Check the homogeneity of the lot — if the homogeneity is in doubt, take more incremental samples. Different products or lots must be sampled separately.

Bulk being moved with a conveyor or other flowing product during filling or emptying Take one aggregate sample from incremental samples, taken across the whole diameter of the stream, at intervals determined by the moving speed during filling or emptying of a tank, tanker truck or reservoir wagon. Use a pipeline sampler L06-01. Connect the filling/emptying pipe with a sampling accessory, consisting of a tap (whether or not heated), which draws incremental samples from the centre of the flow. Several samples should be taken at regular intervals throughout the transfer process. After taking the samples, quickly prepare the aggregate sample in an appropriate metal bucket by mixing vigorously and transfer the samples in appropriate containers.


Manipulación de las muestras
Observaciones generales
  • In principle the minimum quantity of identical final samples, required by the laboratory according to your national guidelines, should be enough, providing you are satisfied the product is homogenous.
  • When possible, take a sample directly into the sample bottle. This reduces the possibility of air absorption, loss of vapours, and contamination.
  • If a mixing vessel is used, all incremental samples from all sampling spots are collected and after they have been thoroughly mixed, an aggregate sample is created.
  • The sample bottle should be filled leaving a small space for expansion due to heat. Samples where the moisture content may affect the analysis must be packed in moisture-tight containers with an airtight closure and must be filled completely.
  • After obtaining the sample, close the bottle immediately with a tight-fitting stopper and check the tightness (leakage test).
  • The sample should be handled and packaged in a well-ventilated place or outdoors.
  • Sampling of heated liquids: The containers are left to cool down before closing. Do NOT re-heat samples as this may affect the properties of the sample — loss of volatile elements or physical/chemical change due to over-heating.
Formulario de muestreo
  • Cumplimente el formulario de muestreo. Deberá adjuntar una copia a las muestras y conservar otra para archivar. Mention if the sample was taken under heated conditions.
Transporte
  • Preferably at ambient temperature. Si fuese preciso, manténganse las muestras refrigeradas según se indique en el etiquetado del producto (caseína, dextrina, almidones o féculas modificadas, etc.).
Almacenamiento
  • Preferably at ambient temperature. Si fuese preciso, manténganse las muestras refrigeradas según se indique en el etiquetado del producto (caseína, dextrina, almidones o féculas modificadas, etc.). Cuando se refrigeran para su almacenamiento, debe supervisarse y registrarse la temperatura.

Cera (lista expandida)
Código SA Descripción


Revisiones
Versión Fecha Cambios
1.0 12.10.2012 Primera versión
1.1 15.01.2021 Update - New template and total text revision