选择合理的、正确的分析技术是减少误差的前提。采用光学分析技术还是色谱法或其他技术。要从样品性质、分析目的、测定项目在样品中的含量等综合考虑。选用技术不得当往往会造成系统误差或根本无法测定。
当分析技术确定后。分析方法是影响测定结果的主要因素。分析方法带来的误差与前处理、分析仪器的特性和分析仪器使用是否得当三个方面有关。前处理和分析仪器的使用得当是人为的因素，细心、熟练的操作可避免或减少渊定误差。分析仪器带来的误差来源于各部件的性能好坏，性能的好坏决定分析仪器在实现信息传递链时，产生的信息是否失真。信息失真有的会使测盆时产生系统误差，影响结果的准确度;有的会产生随机误差，影响结果的度与检测限.
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Yaskawa positionpack-10 CPCC-PP10C (lot of 3)
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2 784 82
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Mitsubishi AD71 AD71S1 programmable controller tested (lot of 3)
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2 784 82
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Solartron 35950523C S-NET PCB
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3 343 17
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Circutor H 30 1C clamp
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2 784 82
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Weber WSG100 4D1042 00-K02 Rev C0 panel
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2 784 82
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Anritsu A5 Scan 322U11171(Y2) & A6 IF LOG/DET 322U11169(Y3)
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ESI CKA 56290
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2 784 82
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TEL 3281-000186-12 DC motor control (lot of 3)
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2 784 82
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Suruga Seiki B56-60U B56-60L & U9121/B33-60KGA
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