with an IR spectrometer. This information can be used when deciding the dilution factor and
analysis method later in the procedure. this step is optional
用红外光谱仪来扫描样品可以获得一个宽广的邻苯二甲酸酯浓度。但需要使用稀释因子可以
使用此方法,这个步骤是可选择的。
A doublet peak at 1600 and 1580cm-1can be observed when phthalates are present in amounts of
~10% or greater(see figure1 ),if this doublet is not observed, the sample should be treated as
containing a low concentrated, If the doublet is present ,the sample can be treated as
concentrated,and a higher dilution factor may be used. the absence of the doublet peak does not
indicate that phthalates are not present in the sample, and that the item is compliant ,conversely, the
presence of the double peak does not indicate that regulated phthalates are present in restricted
amounts
当邻苯二甲酸酯的含量超过10%时,可以在1600 and 1580cm-1 出可以观察到一个双峰,如果
这个双峰观察不到,则样品被认为是含有低浓度的邻苯二甲酸酯,如果双峰能观察到,则认
为样品含有高浓度的邻苯二甲酸酯,可能使用一个较大的稀释因子。
Figure 1.IR spectrum of PVC plastic containing~30%phthaltes
图1,红外光谱仪观测的一个含30%的邻苯二甲酸酯的PVC 样品谱图
这个是CPSC-CH-C1001.09上面介绍的,含量是达到10%