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1��y��ԭ��

��y��֞�ɂ��^�̣��늳��e�^�̡��һ��늉��,��늽��|(zh��)��Һ�еĽ��x��ȱ�߀ԭ��e��늘O��,��S�󱻜y��x�ӱ�߀ԭ��e�ڽ�Ĥ�ϣ��@��һ��^��,��ܳ��^��,��늳��e�^�̽Y(ji��)��󣬹��늘O�λ��ؓ(f��)��ķ��,��@�r��e�Ľ��پ͏�늘O��ܳ�,��@��һ��ܿ��^�̣��Ķ��@�úܴ��ܳ��,��(j��)�ܳ��ĳ��λ�ͷ��,��

2��ԇ򞷽��

2.1 �x��ԇ��

��SVA—1��ʾ��x,��XWT—264��ӛ䛃x,���KCl—AgCl늘O�酢��늘O��̼늘O�鹤��늘O,��(bi��o)��(zh��n)��Һ��Qȡ1.354 0 g�Ȼ��w,��ˮ�ܽ��1 000 mL��ƿ��ϡ��1 L,��Ȟ�1 mg/L,��

��Ȼ��2×10^-3mol/L��}�᣺2.0 mol/L,��ʯӢ��sˮ��Һ,��߼��

2.2��Һ�x��

��Һ��x�ӵķ��λ�ͷ��^��Ӱ�,��x��ѵ�Һ��߷��`��,��ԇ��}��Һ�й��ܳ��ֵ��,��Һ�и�,��}��Һ��Ȟ�2.0 mol/L�r�^��,��ɴ��x��2.0 mol/L�}��Һ��2.0×10^-3 mol/L��Ȼ��ѵ�Һ,��ڴ˵�Һ��-0.4 V�λ̎ͨ��60 s,��60 s��o��30 s��,��100 MV/s��ٶȒ��+1.0 V,��ӛ䛷��Ρ�

2.3��l��ԇ�

��,��늳��e�λ��Ӱ푣��λ��-0.4 V�r��ֵ��ҷ�(w��n)��,��S��λֵ��½��ֵ��½�څ��,��x�ӵĸɔ_(Ҋ�D1),��

��늳��e�r�g��Ӱ푣��ֵ�c늳��e�r�g��,��˿ɸ��(j��)��yҺ�к��_��늳��e�r�g,��

��۵��ٵ�Ӱ푣��^��,��ֵ��(w��n)��^��,��ֵ��40mL/min�^��룬һ��x80 mL/min,��

2.4��

��l��,��Hg²⁺�|(zh��)��Ȟ�(0��100)×10^-3 mg/L�r�c��ֵ�ʾ��P(gu��n)ϵ(Ҋ�D2)��

2.5��x��Ӱ�

��200��Co²⁺,��Mn²⁺,��Ni²⁺��50��Cd²⁺��Pb²⁺,��Al³⁺��Fe²⁺,��Fe³⁺��ɔ_�y��,��Cu²⁺��20��r��y��иɔ_��

2.6 ��Ʒ�y��

��,��坍ˮ��ֱ�Ӝy��,��Ⱦ��(y��n)��ˮ��轛(j��ng)�^�V��y��ȡ�m��ˮ��50 mL��ƿ��,��Һϡ��̶�,��ȡ30 mL��늽Ɑ�Мy��Y(ji��)��Ҋ��1,��

��1��y��Y(ji��)��c��ܶ�ԇ�
ˮ��	Hg²⁺ (×10^-3 mg/L)	ƽ��ֵHg²⁺(×10^-3 mg/L)	��(bi��o)��(zh��n)ƫ��(%)	�ЙC(j��)�� (×10^-3 mg/L)	�� (×10^-3 mg/L)	ԭ�ӟɹⷨ�y��ֵHg2+ (×10^-3mg/L)
��I(y��)�Uˮ1̖	12.5,��11.3��12.6,��13.2,��12.1,��11.8	12.25	5.43	0.01	12.26	12.5
��I(y��)�Uˮ2̖	10.7��11.3,��11.6,��10.2��12.0,��11.8	11.26	6.14	0.01	11.27	11.3
֧�ĺ�ˮ	0.71,��0.75��0.84,��0.73,��0.80��0.82	0.78	6.77	δ�z��	0.78	0.8
��ꖺ�ˮ	1.21,��1.24,��1.13��1.16,��1.08,��1.10	1.15	5.42	δ�z��	1.15	1.2
��ˮ	δ�z��	δ�z��	0	δ�z��	δ�z��	δ�z��

��2��(bi��o)��(zh��n)��ʡ��(20 mLˮ��)
ˮ��	Hg²⁺��(×10^-3mg/L)	Hg²⁺��(×10^-3mg/L)	Hg²⁺��(×10^-3 mg/L)	��(%)
��I(y��)�Uˮ	12.5	20.0	32.1	98.6
��ˮ	0	20.0	19.3	96.4
��ꖺ�ˮ	1.2	20.0	20.3	95.6
�ԁ�ˮ	0	20.0	20.6	103

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3��Y(ji��)��cӑՓ

��늳��e�^��,��Hg²⁺��늘O��߀ԭ��Au�Y(ji��)�Ϟ�Au-Hg��e��늘O��,��ܕr��Hg�ȱ��õ��ܳ��ֵ,��ͨ�^��Ӹ��r�g��߷��`��,��

��늳��e�λ��-0.6 V��r��ߺ��~��ɔ_�y��,��

��,��۲��ͬλ僽𷨿��Ч��ˮ��΢��п��ɔ_��(qi��ng),��`��ȸߵ��c,��(bi��o)��(zh��n)�`��5%��7%��ڷֹ��ȷ�,��cԭ��Ξ�ⷨ��ͬ,��͙z��ޞ�0.01×10^-3 mg/L��Է��(0.01��100)×10^-3 mg/L,��ƽ��Ә�(bi��o)��ʞ�98.4%,��

��ܑ�(y��ng)�ñ��y��ر�ˮ,��I(y��)�Uˮ�е�΢��,��Y(ji��)��cԭ��Ξ�ⷨ��`��-2.0%,��Y(ji��)��˝M��,��