BS EN 16179-2012 pdf download.Sludge , treated biowaste and soil – Guidance for sample pretreatment.
analytical portion
quantity of rnatertal. of proper size. for measurement of the concenb-atlon or other property of interest. removed from the test sample
Note I to entry The test portion may be taken from the field swwl. or from the Iatoralory ariçle c.ctly II no preparation of the sample required (a g with liquids). but usualy it is taken from the prepared lest sanle
Note 2 to entry A umt o increment of proper homogeney. size, and fineness. needing no further preparaon, may be a test porbon
ISOURCE. ISO 11074:2005. 4.3.13)
4 Safety remarks
Special precautions should usually be taken for samples from contammated material. It is Inportant to avoid any contact with the skin end special measures should be taken when dr)ing such samples (ventilation, air removaL etc.). Samples may be hazardous because of the presence of chemcal contaminants. tungal spores. or pathogens such as IepfospErosss
Appropriate national safety precaubons shalt be followed
5 Principle
5.1 General
Pretreatment in this European Standard is the roceu of preparing the test portion from the field sample. The operations and treatment steps are divided into pretreatment procedures suitable In the field (Clause 8) and pretreatment procedures that are resincted to be performed ui the laboratory (Clause 10)
it is important to note that the methods and instruments described are meant as examples for suitable routine procedures. A laboratory may decide to use other procedures andlor instruments as long as the requwements of the analytical task are mel (see Clause 10).
Another important item concrns the part of the sample delivered to the laboratory Which shall be taken for the determinations and the part of the sample which Is removed before starting the tests. Depending on legIslative or other demands only specific fractions of the sample may be analysed (e.g. th. fraction ‘2 mm) Extraneous materials shall be separated and recorded
In case parameters are analysed in the fraction <2 mm usually the results of the tests refer to the fraction c 2 mm. Using the mass fraction >2 mm and the extraneous material removed from the sample the results also can be calculated referflng to the mass of the whole sample The report shall dearly state to which fraction the results refer.
Beside the requirements given in this European Standard, the subsequently applied analytical standards shal be regarded for paslicular requWements to be observed The determination of some parameters requires sample pretreatment soon after sampling as specified In the respective analyhcal methods
If several parameters are being nvesbgated. the sample pretreatment shell be designed so that the parameters of major Importance are determining the pretreatment, If this is not possible, e.g. the required preasion for each parameter can not be achieved, separate pretreatment shall be set up for each group of parameters
Whenever volatile compounds are to be determined, the process of sample pretreatment can result in a substantial loss of these compounds. Sample pretreatment shall be omitted In these cases by taking specific sampls for the determination of volatie components. These samples shal be pretreated in accordance with the appropriate analytical standard and analysed as soon as possible after sampling.
When preparing composite samples the analytical requirements shall be considered. For example. composite samples are not appropnate W volatile compounds are to be determined.
F re 1. Figure 2 and Figure 3 show flow charts for
— pretreatment for inorganic and physico.chamkal parameters in solid sludge, treated biowaste and soil (Figure 1),
— pretreatment for organic parameters in soled sludge. treated biowaste and soil (Figure 2).
pretreatment for inorganic. physo-chemical and organic parameters In liquid sludge (Figure 3).
Askie from the parameter to be determined, the procedure to be applied also depends on the required minriuni mass 01 the sample to be used m relation to the maxuTium particle size D,,, of the sample. For this the relationship described in ISO 103814 ii used (see Table 2 in 8.3).
Grinding of the sample depends on the mass of the subsample being taken. Table 1 gives the requirements for a wide group 01 parameters
For some parameters the requirements stated en 8 3 need not to be followed exactly as the homogeneity of the samples Is enough to obtain adequate results for those parameters
EXAMPLES dry matter. tal organic compojmds (bC). pH. EC.BS EN 16179-2012 pdf download.