Wɔayɛ saa gyinapɛn yi sɛnea mprempren Chinafo gyinapɛn ahorow a ɛfa nnuru a wɔde yɛ kɔbere ne kɔbere afrafrade a wɔde yɛ nneɛma a wɔde yɛ adwuma, a ɛne GB/T468-1997 "Copper Wire Ingots for Electrical Use", GB/T3952-1998 "Copper Wire Billets for Electrical Use", GB/T467-1997 "Ahotew a ɛkorɔn-." Cathode Kɔbere" ne "Standard Cathode Kɔbere", ne GB/T5231-2001 "Kɔbere ne Kɔbere a Wɔayɛ ho adwuma" Gyina "Nnuru a Wɔahyehyɛ ne Nneɛma a Wɔde Yɛ Adwuma" so, mfitiase ɔman gyinapɛn GB/5121-1996 "Nnuruyɛ Nhwehwɛmu Akwan a Wɔde Kɔbere ne Kɔbere Afrafra" ne GB/T13293-1991 "Nnuru Analysis Methods for High-Purity Cathode Kɔbere" yɛ nhyehyɛe wɔayɛ mu nsakrae. Wɔfa nhwehwɛmu akwan a ɛkɔ anim de si nhwehwɛmu akwan a awuduru wom ne nea epira ananmu, na wɔde hydride awo ntoatoaso - non-dispersive atomic fluorescence spectrometry di dwuma de si catalytic oscillopolarography ananmu de kyerɛ arsenic, antimony, selenium, tellurium, ne nea ɛkeka ho Wɔyɛɛ nhwehwɛmu akwan foforo ason na wɔsan kyerɛw bio, a inductively coupled plasma atomic emission ka ho spectrometry nhwehwɛmu kwan ne mercury nhwehwɛmu kwan, ne nea ɛkeka ho.
