QC/T XXXXX—XXXX

I 六价铬的检测方法 QC/T XXXXX—XXXX

II 目 次

前言 ............................................................................... III

引言 ................................................................................ IV

1 范围 .............................................................................. 1

2 规范性引用文件 .................................................................... 1

3 X射线荧光光谱法 ................................................................... 1

3.1 原理 .......................................................................... 1

3.2 试剂和材料 .................................................................... 1

3.3 仪器和设备 .................................................................... 2

3.4 样品制备 ...................................................................... 2

3.5 分析步骤 ...................................................................... 2

3.6 结果分析 ...................................................................... 3

4 金属防腐镀层中六价铬定性试验 ...................................................... 3

4.1 原理 .......................................................................... 3

4.2 试剂和材料 .................................................................... 4

4.3 仪器和设备 .................................................................... 4

4.4 样品制备 ...................................................................... 4

4.5 试验 .......................................................................... 4

5 金属防腐镀层中六价铬含量测定 ...................................................... 6

5.1 原理 .......................................................................... 6

5.2 试剂和材料 .................................................................... 6

5.3 仪器和设备 .................................................................... 6

5.4 样品制备 ...................................................................... 6

5.5 分析步骤 ...................................................................... 6

5.6 结果计算 ...................................................................... 7

5.7 精密度 ........................................................................ 8

6 聚合物材料和电子材料中六价铬含量测定 .............................................. 8

6.1 原理 .......................................................................... 8

6.2 试剂和材料 .................................................................... 8

6.3 仪器和设备 .................................................................... 9

6.4 样品制备 ...................................................................... 9

6.5 分析步骤 ...................................................................... 9

6.6 结果计算 ..................................................................... 10

6.7 精密度 ....................................................................... 11

7 皮革材料中六价铬含量测定 ......................................................... 11

7.1 原理 ......................................................................... 11

7.2 试剂和材料 ................................................................... 11

7.3 仪器和设备 ................................................................... 11 QC/T XXXXX—XXXX

III 7.4 样品制备 ..................................................................... 12

7.5 分析步骤 ..................................................................... 12

7.6 结果计算 ..................................................................... 13

7.7 回收率和检出限 ............................................................... 14

8 试验报告 ......................................................................... 14

附录A（资料性附录） 紧固件镀层表面积计算方法 ....................................... 15

A.1 紧固件表面积计算公式 ......................................................... 15

A.2 螺栓、螺母表面积计算数据 ..................................................... 15

附录B（规范性附录） 聚合物材料和电子材料中六价铬含量测定方法回收率的测定和检出限的确定 .................................................................................... 18

B.1 回收率的测定 ................................................................. 18

B.2 检出限的确定 ................................................................. 18

附录C（规范性附录） 皮革材料中挥发物含量的测定 ..................................... 20

C.1 样品制备 ..................................................................... 20

C.2 分析步骤 ..................................................................... 20

C.3 结果计算 ..................................................................... 20

C.4 精密度 ....................................................................... 20

附录D（规范性附录） 皮革材料中六价铬含量测定方法回收率的测定 ....................... 21

D.1 基质对回收率的影响 ........................................................... 21

D.2 反相材料（RP）对回收率的影响 ................................................. 21