依风1986
第14楼2012/05/25
在混侧中MATTEL也是有要求的。
No more than 3 samples may be combined.
不得超过三种样品混合。
• The difference of 3 sample weights should be less than 0.02g. Determine which sample is
present in the smallest amount (weight) in the composite. For example: x is less than y and x
is less than z.
三个不同的样品重量不得超过0.02g。每个样品在混合试样中的含量要小于其它任意一个数量。
例如:x小于y并且x要小于z。
• Designate and record the measured concentration of heavy element in the composite sample
as”Cavg”
用”Cavg”代表和报告混合物中每种重金属的测量含量。
• Determine the maximum possible concentration of heavy element (Cmax) in a single sample as
follows:
Cmax=Cavg*(x+y+z)/x
按照下列公式确定单个样品中每种重金属最大可能含量:
Cmax=Cavg*(x + y + z)/x
• Compare the Cmax to the requirement limit. IF Cmax is less than limit, then each sample in the
composite sample is deemed comply with the requirement and no further testing is required.
If Cmax is greater than the limit. All samples in the composite sample must be tested
individually. When use the results from the total digestion test to satisfy soluble 1 and
Soluble 2 requirements, IF Cmax is larger than the soluble limits, soluble method 1 and 2 must
be performed.
用Cmax与要求的限值比较。如果Cmax小于限值,混合样品中的每个样品都符合要求,不必进一步
测试。如果Cmax大于限值。混合样品中的所有样品要分开测试。当用总量消解测试出具结果时必须
符合可溶性方法1和可溶性方法2的要求,如果Cmax大于可溶性限值,要进行可溶性方法1和可溶性2
所以混测也是讲究的
zghendry
第18楼2013/08/06
前提是客户混合的样品全部是等量混合的,否则全都是扯蛋。反应不了样品的真实情况,那样的客户很明显,就是为了花最少的钱得到一份涵盖他所有产品的一份合格报告。