飼料添加劑 蘇氨酸鋅螯合物

1、DB43湖 南 省 地 方 標(biāo) 準(zhǔn)DB43/T XXXXXXX 飼料添加劑 蘇氨酸鋅螯合物 Feed additive Threonine zinc chelate （征求意見稿）XXXX - XX -XX發(fā)布 XXXX - XX -XX實施湖南省市場監(jiān)督管理局 發(fā) 布DB43/T XXXXXXX目 次前言························&#

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84、;······························10 DB43/T XXXXXXX前 言本文件按照GB/T 1.1-2020標(biāo)準(zhǔn)化工作導(dǎo)則 第1部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則的規(guī)定起草。本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機(jī)構(gòu)不承擔(dān)識別這些專利的責(zé)任。本文件由湖南省市場監(jiān)督管理

85、局提出并歸口。本文件起草單位：長沙興嘉生物工程股份有限公司。本文件主要起草人：黃逸強(qiáng)、彭紅星、洪雙勝、鐘芳、羅丹。1飼料添加劑 蘇氨酸鋅螯合物1 范圍本標(biāo)準(zhǔn)規(guī)定了飼料添加劑蘇氨酸鋅螯合物的術(shù)語和定義、要求、試驗方法、檢驗規(guī)則及標(biāo)簽、包裝、運(yùn)輸、貯存和保質(zhì)期。本標(biāo)準(zhǔn)適用于飼料添加劑蘇氨酸鋅螯合物的生產(chǎn)、銷售和使用。2 規(guī)范性引用文件下列文件對于本文件的應(yīng)用是必不可少的。凡是注日期的引用文件，僅所注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改單）適用于本文件。GB/T 5917 飼料粒度測定方法GB/T 6435 飼料水分的測定方法GB/T 6682 分析實驗室用水規(guī)

86、格和試驗方法GB 10648 飼料標(biāo)簽GB 13078 飼料衛(wèi)生標(biāo)準(zhǔn)GB/T 13079 飼料中總砷的測定方法GB/T 13080 飼料中鉛的測定方法GB 13082 飼料中鎘的測定方法GB/T 14699.1 飼料采樣GB/T 18823 飼料檢測結(jié)果判定的允許誤差 3 化學(xué)名稱、分子式、相對分子質(zhì)量和結(jié)構(gòu)式化學(xué)名稱：蘇氨酸鋅螯合物分子式：C8H20N2O8Zn相對分子質(zhì)量：337.63 (按2011年國際相對原子質(zhì)量計)結(jié)構(gòu)式：(C4H8NO3)2Zn·2H2O4 術(shù)語和定義本文件沒有需要界定的術(shù)語和定義。5 技術(shù)要求5.1 外觀與性狀本品淺黃色或類白色結(jié)晶性粉末或細(xì)小顆粒，微溶

87、于水，溶于酸，無刺激性氣味。5.2 技術(shù)指標(biāo)表 1項 目指 標(biāo)鋅（以Zn計） %18.5總蘇氨酸 %67.0砷（As） %0.0005鉛（Pb） %0.001鎘（Cd） %0.0005水分 %10.00粒度（孔徑0.84mm試驗篩通過率%）95.06 采樣按GB/T 14699.1的規(guī)定進(jìn)行采樣。7 試驗方法除非另有規(guī)定，本文件所用試劑和水，均指分析純試劑和GB/T 6682中規(guī)定的三級水，所用標(biāo)準(zhǔn)溶液、制劑及制品，均按GB/T 601、GB/T 602、GB/T 603規(guī)定的方法制備。7.1 感官檢驗取約20g的試樣置于清潔、干燥的白瓷盤內(nèi)，在自然光下目視觀察其色澤和狀態(tài)。7.2 鑒別實驗7

88、.2.1 試劑或材料7.2.1.1 鹽酸溶液（1+10，v/v）：取100mL濃鹽酸緩緩加入到1000mL水中，即得。7.2.1.2 氨水溶液（1+1，v/v）：取水100mL加入到100mL濃氨水中，即得。7.2.1.3 硫酸鈉溶液：250g/L。7.2.1.4 10g/L雙硫腙四氯化碳溶液：取雙硫腙1g加四氯化碳使其溶解至100mL，即得，使用期為兩周。7.2.1.5 三氯甲烷 AR。7.2.1.6 茚三酮溶液：1g/L水溶液。7.2.2 儀器設(shè)備7.2.2.1 分析天平：感量0.0001g。7.2.3 鋅離子的鑒別稱取0.2g試樣，加（1+10）10mL（7.2.1.1）鹽酸溶液，加熱至

89、試樣全部溶解，加5mL水，用氨水（7.2.1.2）調(diào)節(jié)試驗溶液PH值為45，加兩滴硫酸鈉溶液（7.2.1.3），再加數(shù)滴雙硫腙四氯化碳溶液（7.2.1.4），和1mL三氯甲烷（7.2.1.5），振搖后，有機(jī)層顯紫紅色。7.2.4 蘇氨酸的鑒別7.2.4.1 茚三酮試驗稱取試樣0.1g，溶于100mL水中，取該溶液5mL，加1mL茚三酮溶液（7.2.1.6），加熱，溶液呈藍(lán)紫色，隨溫度升高顏色加重。7.3 鋅含量的測定7.3.1 試劑或材料7.3.1.1 鹽酸溶液（1+3，v/v）：移取25 mL鹽酸（優(yōu)級純或更高純度）加入至75 mL水中，混勻。7.3.1.2 20%六次甲基四胺溶液：稱取20

90、0g六次甲基四胺試劑溶解于700mL水中，然后定容至1000mL容量瓶中，搖勻備用。7.3.1.3 0.2%二甲酚橙指示劑：稱取0.2g二甲酚橙指示劑于燒杯中，加適量水溶解，然后定容至100mL容量瓶中，搖勻，使用期限兩周。7.3.1.4 0.05mol/L EDTA-2Na標(biāo)準(zhǔn)滴定溶液。7.3.2 儀器設(shè)備7.3.2.1 分析天平：感量0.0001g。7.3.2.2 酸式滴定管：50mL。7.3.3 方法原理將樣品處理后，用酸溶解，加適量水，以六次甲基四胺調(diào)節(jié)溶液的pH值至56，以二甲酚橙為指示劑，用EDTA-2Na標(biāo)準(zhǔn)滴定溶液滴定至顏色由紫紅色變?yōu)榱咙S色即為終點。7.3.4 測定步驟準(zhǔn)確稱

91、取樣品0.2-0.5g（精確至0.0002g），加5mL（1+3）的鹽酸（7.3.1.1），加入適量水加熱溶解，加2滴二甲酚橙指示劑（7.3.1.3），然后滴加六次甲基四胺溶液（7.3.1.2）至溶液呈穩(wěn)定的紫紅色后再過量5mL，用0.05mol/L EDTA標(biāo)準(zhǔn)溶液（7.3.1.4）滴定至溶液由紫紅色突躍為亮黃色或橙黃色即為終點。7.3.5 結(jié)果計算：試樣中鋅含量以計，質(zhì)量分?jǐn)?shù)用（%）表示，按以下式（1）計算：=c×V×0.06539m×100 （1）式中： c乙二胺四乙酸二鈉標(biāo)準(zhǔn)滴定溶液的濃度，mol/L；V滴定樣品消耗乙二胺四乙酸二鈉標(biāo)準(zhǔn)溶液的體積，mL；m稱樣試樣的質(zhì)量，g；0.06539與1.00mL乙二胺四乙酸二鈉標(biāo)準(zhǔn)溶液（cEDTA-2Na=1.000mol/L）相當(dāng)?shù)匿\的質(zhì)量，g。測定結(jié)果以兩次平形測定的算術(shù)平均值表示，結(jié)果保留兩位有效數(shù)字。7.3.6 精密度在重復(fù)性條件下，兩次獨(dú)立測定結(jié)果絕對差值不得超過0.3%。