Petroleum ether 40-60°C, for analysis, n-hexane Quay lại Yêu thích (function (d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = “//connect.facebook.net/vi_VN/sdk.js#xfbml=1&version=v2.6&appId=676651149130836”; fjs.parentNode.insertBefore(js, fjs); }(document, ‘script’, ‘facebook-jssdk’));