西部皮革
西部皮革
서부피혁
WEST LEATHER
2013年
10期
46-47
,共2页
加权最小二乘法%标准曲线%权重因子%游离甲醛
加權最小二乘法%標準麯線%權重因子%遊離甲醛
가권최소이승법%표준곡선%권중인자%유리갑철
weighted least square%standard curve%weighting factor%free formaldehyde
化学分析工作中,两个变量之间的关系一般采用最小二乘法建立标准曲线,如果分析测定的变量范围宽,在低浓度区域则分析结果的相对误差较大,本文主要讨论了以加权最小二乘法建立标准曲线的优越性,并以GB/T 19941-2005乙酰丙酮法测皮革中游离甲醛为应用实例,介绍了加权最小二乘法的原理、计算公式、权重因子在提高低浓度测定相对误差的作用.
化學分析工作中,兩箇變量之間的關繫一般採用最小二乘法建立標準麯線,如果分析測定的變量範圍寬,在低濃度區域則分析結果的相對誤差較大,本文主要討論瞭以加權最小二乘法建立標準麯線的優越性,併以GB/T 19941-2005乙酰丙酮法測皮革中遊離甲醛為應用實例,介紹瞭加權最小二乘法的原理、計算公式、權重因子在提高低濃度測定相對誤差的作用.
화학분석공작중,량개변량지간적관계일반채용최소이승법건립표준곡선,여과분석측정적변량범위관,재저농도구역칙분석결과적상대오차교대,본문주요토론료이가권최소이승법건립표준곡선적우월성,병이GB/T 19941-2005을선병동법측피혁중유리갑철위응용실례,개소료가권최소이승법적원리、계산공식、권중인자재제고저농도측정상대오차적작용.
In chemical analysis, the relationship between two variables, least squares method is adopted to establish the standard curve. If the analysis variable scope is wide, in low concentration region the results of the analysis of relative error is larger. This paper mainly discusses with the weighted least squares method to establish the superiority of the standard curve. By taking acetyl acetone method described in GB/T19941-2005 as example, free formaldehyde in leather is determined. in which the principle of weighted least squares method, calculation formula and in impact of weighting factor on decreasing the measuring relative error in low concentration is discussed.
