方法

监测井水样

测定值(mg/L)

均值(mg/L)

RSD%

加标回收率%

亚甲基蓝分光光度法

N.D.

0.032

0.034

4.0

64

N.D.

0.034

68

N.D.

0.035

70

N.D.

0.036

72

N.D.

0.033

66

N.D.

0.034

68

N.D.

0.033

66

氮吹连续流动仪法

N.D.

0.049

0.050

1.8

98.0

N.D.

0.051

102

N.D.

0.051

102

N.D.

0.049

98.0

N.D.

0.050

100

N.D.

0.051

102

N.D.

0.050

100