Abstract： AS 2862.1:2021 pdf download.Copper, lead, zinc and nickel concentrates -Sampling Part 1: Sampling procedures for determination of metal andmoisture content. Finally, the total variance 4 can be estimated experimentally by collecting interpe...

AS 2862.1:2021 pdf download.Copper, lead, zinc and nickel concentrates -Sampling Part 1: Sampling procedures for determination of

metal andmoisture content.

Finally, the total variance 4 can be estimated experimentally by collecting interpenetrating duplicate samples (see 45). This is

called the ‘interleaved sample” method and gives valuable information on the total variance actually achieved for a given

sampling scheme with no extra effort, provided facilities are available For collecting duplicate samples (MerkslSl). It gives no

information on vatiance components, but the total variance can be compared with the analytical variance to ascertain whether the

sampling scheme used was optimized or not. It is therefore of limited use for designing sampling schemes, but it can be used to

monitor whether a sampling scheme is in control.

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